Vibrations

A discussion of the vibration mechanics behind the advent of consciousness of many sentient souls interacting with one another has been presented. It is emphasized that consciousness vibration is the most important phenomenon triggering and spearheading what we commonly refer to as organic ‘life.’ A brief account of the phenomenon of collective (unity) consciousness has been explicated, with more details being deferred to the publication of a companion paper on the subject matter. It is elucidated that the power of consciousness is not just confined to creationism or the necessity of ensuring the longevity of what has been created by a single being; consciousness is superpositional in nature, which means, it may be accentuated through the vibrations of the mind of many sentient beings who resonate harmoniously and synchronously with one another. In this respect, consciousness of one sentient being influences the consciousness of one or many other individuals. This is indeed, how we form the matrix of our reality. Moreover, consciousness has the propensity of multiplying or expanding, which is why the Prime Creator has only demanded one endeavor from all sentient beings, which is to strive to expand their consciousness. Thus, we are all potentially ‘consciousness generators.’ Accordingly, a discussion of the parameter of ‘consciousness expansibility coefficient’ introduced by the author before has been given, herein. It is explicated that the natural frequency of conscious vibration is proportional to the square root of the consciousness expansibility coefficient. In fact, the consciousness expansibility coefficient of a sentient soul describes a trait (or quality) of the soul that is analogous to the ‘stiffness’ of an elastic helical spring that could be loaded with life’s karmic forces. In this respect, it epitomizes the resilience of the soul to be able to withhold such forces. Moreover, it describes the capability of a sentient being to acquire more spiritual education, thus adding to the frequency of its consciousness. Clearly, the more resilient the soul of the conscious being is, the more propensity it has for enlightenment and ‘consciousness expansibility,’ without being prone to instability or buckling, falling out of Light. However, unlike the stiffness characteristic of a non-sentient material or being that acts as a ‘sink,’ it always undergoes a ‘conservative’ operation in which it never dissipates energy as long as the sentient being is allowed to experience life within a Tri-Wave or an open loop of free energetic dispensation as it is usually supplied by the progenitor God-SOURCE. The structure of the soul is so resilient that it can absorb and transform the residual inelastic karmic energies stored WITHIN, ensuring full recoverability. More specifically, a resilient sentient is capable of redeeming all its accumulated residual internal karmic energy stored WITHIN, through clearing and cleansing at a later date, without any eventual possibility of damage or degradation. This is in concert with what the author has introduced as the concept of ‘sentient vibration’ by way of a ‘conservative’ energetic transformation through returning to its initial equilibrium state of vibration in which it preserves its state of consciousness expansibility or natural frequency of consciousness. But, if the entity excessively expands away from its original equilibrium state (referred to as the Zero-Point Field), it may have to permanently shift its position from the initial Zero-Point Energetic Field (‘Neural Network of God,’ which also signifies the open loop or the energetic fountain supply provided by the God-SOURCE). This way, it behaves as a helical spring undergoing inelastic deformation, expanding away from the open loop energetic supply of God and eventually separating itself from the God-SOURCE (referred to as becoming ‘fallen’), changing to a non-sentient (non-organic) being.  And, the clearing and cleansing of the soul’s emotional body of the accumulated residual inelastic karma culminates in effectively restoring its diminished consciousness expansibility, and thus, its frequency of consciousness. It may even lead to effectively raising its natural frequency to its full potential, being capable to Ascend, permanently shifting its anchored equilibrium (domicile) state to a higher dimension. It is then said that the soul undergoes syntropy (consciousness expansion), effectively increasing its propinquity with respect to the SOURCE.  This is referred to as the state of ‘positive karma’ as opposed to ‘negative karma,’ a scenario in which the soul through the expenditure of entropic energies begins to deflect away from the God-SOURCE (diminishing its propinquity), effectively leading to reducing its consciousness expansibility and natural frequency of consciousness vibration. And, through syntropic energetic experience one eventually undergoes ‘Ascension’ through sequentially transmigrating its consciousness and anchoring itself to the higher (more inner) dimensions of consciousness. Note that the soul constitution (matter-antimatter), however, remains virtually constant. Thus, for all practical purposes, the natural frequency of the soul is determined by its extent of consciousness expansibility coefficient, which could constantly change. Ascension occurs when the body becomes crystalline, being comprised of a perfect structure without the presence of any defects or the possibility of ever developing any, rendering the body to become ageless. And, mathematically, crystallinity is synonymous with raising the ‘consciousness expansibility coefficient.’ And, with increasing consciousness expansibility coefficient, one becomes multidimensional, capable of exploring even higher dimensional realms of consciousness, with the dynamic position of equilibrium about which one usually vibrates being shifted higher or deeper in innerspace, gaining more propinquity with respect to the SOURCE. And, all this demands impeccability and gaining spiritual mastery. Since the prime directive specifies consciousness expansion, it is incumbent on the soul to acquire experiential endeavors that culminate in overall contraction to, versus deflection from, the SOURCE. And, this means positive karma, procured through creational endeavors and through benevolence and application of the principles of compassion and unconditional love and effectively having reverence for the provisions of the Law of One. Another aspect of consciousness expansibility is triggered through awareness and interaction of souls with one another in which one Soul Aspect acts as the Beacon of Light, spiritually awakening and enlightening its other Soul Aspects. Accordingly, the consciousness of a sentient being affects the consciousness of all other sentient beings, provided that they become aware of each other’s presence. Accordingly, the author has introduced a new parameter dubbed as the ‘consciousness expansibility linkage coefficient k_ij’, when the consciousness of one sentient entity i is envisaged to affect the state of consciousness of the sentient being j. Finally, equations are presented herein that describe the overall natural frequency and consciousness expansibility of a collective.

Arduino based third eye or extra vision for blind people have a project which include both hardware and the software work and it helps the person to recognize the object by the help of ultrasonic waves which comes from ultrasonic sensor with a vibration which is generated by the buzzer. This Project is influenced by the Stick which is used by the blind people while walking for long term carry the stick is measure issue for weak people. So, this is the wearable invention for the weak and blind people they don't need to carrying anything in hand while walking they should only wear our invention and used to get walking easily. The Arduino is a software device which include. coding as a software function and Ultrasonic sensor, buzzer, Battery and more things as a hardware function, Ultrasonic sensor has a work to recognize the object near them and providing the signal via buzzer to the user which help the person to reach properly at their destination.

One of the main tasks in structural health monitoring process is to create reliable algorithms that are capable of translating the measured response into meaningful information reflecting the actual condition of the monitored structure. The authors have recently introduced a novel unsupervised vibration-based damage detection algorithm that utilizes self-organizing maps to quantify structural damage and assess the overall condition of structures. Previously, this algorithm had been tested using the experimental data of Phase II Experimental Benchmark Problem of Structural Health Monitoring, introduced by the IASC (International Association for Structural Control) and ASCE (American Society of Civil Engineers). In this paper, the ability of this algorithm to quantify structural damage is tested analytically using an experimentally validated finite element model of a laboratory structure constructed at Qatar University.

This study is both a qualitative and a quantitative approach of the nonlinear vibrations of the mechanical elastic systems with polynomial damping. It gives the physical and mathematical modelling and numerical simulation of the dynamics of one degree of freedom mechanical systems and shows the diagrams of the curves of different characteristics (amplitude, displacement, power) function of the polynomial coefficients of damping. It also shows the variation of the same characteristics function of the frequency of the harmonic force of excitation. The numerical simulation has done with the data of real technological equipment: an industrial conveyor driven by inertial vibrator which has tested in site by the specialists of The Research Centre of Machines, Mechanic and Technological Equipments - MECMET.

This paper refers to a silicon micromachined tuning fork gyroscope, which is driven via two piezoelectric thin film actuators. The device responds to an external angular rate by a torsional motion about its sensitive axis due to the Coriolis effect. The shear stress in the upper torsional stem, which is proportional to the angular rate, is detected via a piezoresistive readout structure. In addition to the wanted signal corresponding to the angular rate, there are unwanted contributions from the drive motion, e.g., from mechanical unbalances and from asymmetries of the piezoelectric excitation induced by fabrication tolerances. These effects, which disturb the sensor signal with varying contributions in amplitude and phase, have already been examined for capacitive surface micromachined sensors. In this paper, they are identified for a piezoelectrically driven, bulk-micromachined gyro and compared to results of FEM simulations. System-level simulations are performed and show possibilities to compensate the main parasitic effects. Results of eliminating the mechanical unbalance by femtosecond laser trimming are presented and compared with the simulations.

Casting is one of the oldest and mostly used production methods in industry. The traditional casting has certain disadvantages like poor strength due to hot tears, shrinkage and poor surface finish. The properties of casted product mostly depend on the microstructure after solidification. Providing Mould vibration during casting is one of the latest techniques employed in order to get better structure in the solidified casting. Mould vibration during casting gives reduced amount of shrinkage, better morphology, surface finish, and less chances of hot tear. In this research work the effect of mould vibration on casting during solidification of Al-6063 alloys for different values of wave lengths at fixed pouring temperatures is investigated to understand the changes in microstructure and mechanical properties of casting .The casting has been prepared in iron EN8 mould with and without vibrations. The frequencies varied from 0Hz to 40 Hz. A casting has been made without vibration as well to compare the results of castings with vibration. The experimental results showed significant grain refinement and remarkably improvement in mechanical properties of casting with mechanical mould vibration during solidification.

We propose a continuous model for rectangular plates that involves a mesh of slender interconnected beams. These beams are disposed orthogonally. The advantage of this model is that simple equations are involved and the behavior of the plate is accurately described. After a brief description of the model, we present an application written in the Python programing language that allows calculating the mode shapes for rectangular plates with various boundary conditions. The mode shapes achieved with the application for a specific plate are found to be similar with those obtained from simulation involving the SolidWorks software. In consequence, we conclude that the proposed model is reliable and the application developed on this base can be used to study the behavior of rectangular plates with different boundary conditions.

We propose a continuous model for rectangular plates that involves a mesh of slender interconnected beams. These beams are disposed orthogonally. The advantage of this model is that simple equations are involved and the behavior of the plate is accurately described. After a brief description of the model, we present an application written in the Python programing language that allows calculating the mode shapes for rectangular plates with various boundary conditions. The mode shapes achieved with the application for a specific plate are found to be similar with those obtained from simulation involving the SolidWorks software. In consequence, we conclude that the proposed model is reliable and the application developed on this base can be used to study the behavior of rectangular plates with different boundary conditions.

Environmental concerns coupled with the depletion of fuel sources has led to research on ethanol, fuel cells, and even generating electricity from vibrations. Much of the research in these areas is stalling due to expensive or environmentally contaminating processes, however recent breakthroughs in materials and production has created a surge in research on waste heat energy harvesting devices. The thermoelectric generators (TEGs) used in waste heat energy harvesting are governed by the Thermoelectric, or Seebeck, effect, generating electricity from a temperature gradient. Some research to date has featured platforms such as heavy duty diesel trucks, model airplanes, and automobiles, attempting to either eliminate heavy batteries or the alternator. A motorcycle is another platform that possesses some very promising characteristics for waste heat energy harvesting, mainly because the exhaust pipes are exposed to significant amounts of air flow. A 1995 Kawasaki Ninja 250R was used for these trials. The module used in these experiments, the Melcor HT3-12-30, produced an average of 0.4694 W from an average temperature gradient of 48.73 • C. The mathematical model created from the Thermoelectric effect equation and the mean Seebeck coefficient displayed by the module produced an average error from the experimental data of 1.75%. Although the module proved insufficient to practically eliminate the alternator on a standard motorcycle, the temperature data gathered as well as the examination of a simple, yet accurate, model represent significant steps in the process of creating a TEG capable of doing so.

In this paper, we present a new generation of active tactile modules (i.e., HEX-O-SKIN), which are developed in order to approach multimodal whole-body-touch sensation for humanoid robots. To better perform like humans, humanoid robots need the variety of different sensory modalities in order to interact with their environment. This calls for certain robustness and fault tolerance as well as an intelligent solution to connect the different sensory modalities to the robot. Each HEX-O-SKIN is a small hexagonal printed circuit board equipped with multiple discrete sensors for temperature, acceleration, and proximity. With these sensors, we emulate the human sense of temperature, vibration, and light touch. Off-the-shelf sensors were utilized to speed up our development cycle; however, in general, we can easily extend our design with new discrete sensors, thereby making it flexible for further exploration. A local controller on each HEX-O-SKIN preprocesses the sensor signals and actively routes data through a network of modules toward the closest PC connection. Local processing decreases the necessary network and high-level processing bandwidth, while a local analog-to-digital conversion and digital-data transfers are less sensitive to electromagnetic interference. With an active data-routing scheme, it is also possible to reroute the data around broken connections-yielding robustness throughout the global structure while minimizing wirings. To support our approach, multiple HEX-O-SKIN are embedded into a rapid-prototyped elastomer skin material and redundantly connected to neighboring modules by just four ports. The wiring complexity is shifted to each HEX-O-SKIN such that a power and data connection between two modules is reduced to four noncrossing wires. Thus, only a very simple robot-specific base frame is needed to support and wire the HEX-O-SKIN to a robot. The potential of our multimodal sensor modules is demonstrated experimentally on a robot platform.

Railroad freight car safety and maintenance cost is directly related to knowledge of the actual braking force provided by a brake shoe. If the brake force is too low, safety is at risk. If the brake shoe is replaced before the end of it's lifetime to ensure safety, maintenance and thus operating costs are increased. Through Federal Railroad Administration (FRA) funding under the Department of Transportation (DoT) small business innovative research (SBIR) program, Mide Technology Corporation is developing a self-powered brake force measurement system applicable to freight trains. The system provides its own power using Mide's proprietary piezoelectric energy harvester that harnesses energy from structural vibrations inherent on all trains. The brake force is measured using specialty high temperature strain gauges installed directly on the brake beam.

The paper is aimed at studying the motion conditions of the vibratory compacting machine equipped with the crank excitation mechanism characterized by the changeable geometrical parameters. Unlike numerous scientific publications devoted to similar subject, the novelty of the present research consists in the improved design of the vibro-impact plate compactor and the developed mathematical model describing the motion conditions of the compactor's oscillatory system. It is proposed to use the crank mechanism to excite the oscillations of the impact body acting upon the frame of the compacting plate at a certain angle to the surface being compacted. The main idea of this improvement is to provide the self-propelling locomotion conditions of the compactor and to reduce the pushing force that must be applied by the operator. The research results obtained by means of the numerical modeling in Mathematica software describe the dynamic behavior of the compactor's oscillatory system under different geometrical parameters of the crank excitation mechanism (crank eccentricity, impact gap, etc.). The material of the paper can be of significant practical interest for the designers and engineers dealing with the development of new vibratory compactors and the improvement of compacting technologies.

For many years the problem of noise generated by trains has had an increasing importance; in this paper, attention is focused on the noise generated by the train wheels due to their vibration. Today there are many kinds of railway wheels which are affected by different noise generation mechanisms. If the traditional and well known solid wheel is considered, a lot of data is already present in the literature both concerning the vibration and the noise point of view. On the other hand, the widely used resilient wheels are not so well known in their vibratory and acoustic behaviour as in the case of solid ones. The extensive experimentation presented and commented in this paper looks for a confirmation of some literature data first, and then it gives new results. Particularly the vibro-acoustic characterization of different kinds of wheels (both solid and resilient ones) has been carried out, in order to have a comparison between the behaviour of the newly built wheels and the older ones, representing the state of the art. Besides it has been shown that a detailed modal analysis of the suspended wheel coupled to sound measurements can give useful information about the wheel noise emission in its normal operating conditions.

The autonomous sensory meridian response (ASMR) is a sensory phenomenon, sometimes referred to as a "brain orgasm," which involves pleasant tingling sensations in a body in reaction to certain stimuli. This article analyzes ASMR within the framework of ideas put forward by the musique concrète that offered new sensibilities of musical expression and promoted attentive listening to matter. At the same time, we treat sonic practices of ASMR as inspired by the concepts developed by New Materialism, especially the notions of physicality and materiality of sound recognized within the ontology of its vibrational force.

Car cabin interior vehicle acoustical comfort is one of the factors which attract the buyers to purchase the vehicle in order to have comfort sound and minimum noise in passenger car cabin. Basically the amount of discomfort depends to magnitude, frequency, direction and also the duration of exposed vibration in the cabin. The comfort of the driving influences driving performance. Generally the vibration is caused by two main sources: engine transmission and interaction between tyre and road surface. In this study the effects of tyre to vehicle acoustical comfort were investigated. A vehicle acoustical comfort index (VACI) was used to evaluate the effect of tyre to vehicle acoustical comfort. By substituting the sound quality (loudness, sharpness, roughness, and fluctuation strength) which were influenced by the vibration due to interaction between tyre and road surface, both of the VACI values (stationary and moving) can be obtained, and the difference between both values can be considered as the effect of the tyre. The sound quality study has focused on the estimation of the noise quality changes through the trends pattern based on the generated sound quality which relates to engine speeds. From the results, the amounts of sound quality changes with the increase of the engine speeds, except for both of fluctuation strength and sharpness parameters. The results of the study provide one method to predict the amounts of the VACI values caused by the effect of the tyre and the interaction between tyre and road surface.

Wireless Sensor Network stands as one of the most emerging technologies combining together sensing, computational capability and communication into minute devices proceeding towards whole new world of simplicity. The design of a WSN depends significantly on the application, and it must consider factors such as the environment, the application's design objectives, cost, hardware, and system constraints. There is a necessity of an intermediate software layer between the sensor hardware and the sensor network applications that may be termed as middleware. In wireless sensor network, a collection of small sensor nodes communicates through radio interface. Generally Wireless Sensor Network (WSN) consists of many distributed devices spatially, using sensors to monitor various conditions at various points, including temperature, sound, vibration, pressure, motion or pollutants. WSN acts as a mediator between the real physical world and the virtual world.

In this paper a new idea is proposed and studied to supply deep sea low-consumption devices using low-cost disk piezoelectric elements. The system scavenges energy from a water flow using piezoelectric materials and the characteristic undulating movement of bodies with pozitive buoyancy that are attached to the seabed with flexible cords, similat to an inverted pendulum. The piezoelectric components, together with the movement of the inverted pendulum, create an electrical power generator that harvests the mechanical energy brought by the sea movements. In addition, is studied to maximize the pendulums undulating motion by means of vortices produced by a cylindre situated upsetream. A prototype with the proposed electronic harvesting system is built and tested. The evaluation consist on testing the performance of the piezoelectric device and observe the electrical power generated.

The need for new and better means of designing new structures and retrofitting existing ones from the damaging effects of severe environmental loadings has motivated civil engineers to develop innovative simple concepts of structural control to preserve the structural integrity of these buildings. One of the most effective concepts is the use of a tuned mass damper (TMD) to reduce the undesirable vibrations and enhance the response of the structure induced by wind or earthquake loads. The TMD is a passive energy absorbing device, consists of a mass, spring and a viscous damper attached to the structure. This system has proved to be significant in protecting environmental threats of large structures like towers, bridges and high rise buildings. Despite the fact that the TMD system has been successfully used for high-rise buildings, it needs a huge mass and a large room for installation at the top floor of the building, causing extra production cost and storage space problems. The present study aims to apply this concept for ordinary low-rise buildings making use of part of the building as the pendulum mass like water storage tanks located at top of the roof for these buildings. In this case the water tanks should be hung from the topmost story girder forming a pendulum. The damper of this type needs neither additional mass nor space because the building equipment is integrated into the damper. The study will develop a simple analytical technique which may be used by the designers to find out the optimum parameters of TMD that result in considerable reduction for the lateral vibrations.

In this study the characterization of an aluminum nitride (AlN) double ended tuning fork (DETF) fabricated on a layer of silicon dioxide (SiO 2 ) is presented. The positive temperature coefficients of SiO 2 are used to achieve zero TCF for radio frequency (RF) Lamb wave resonators. This paper shows the possibility to integrate temperature compensated Lamb wave resonators with DETF-based devices on a single chip. The DETF resonates in a quasi-in-plane mode shape with a Q-factor of 578 in air and 3028 in vacuum. Through a laser Doppler velocity (LDV) measurement we also show that, due to the biomorph nature of the structure and the angle of the side walls, the motion of each tine of the DETF is a combination of in-plane bending, out-of-plane bending and torsional motion around the beam main axis.

This paper derives the analytical characterization of Maxwell radial vibrations due to saturation effects in induction machines, and especially in traction motors. The number of nodes and the velocity of these particular force waves are experimentally validated by visualizing some operational deflection shapes of the stator. It is shown that according to the stator and rotor slot numbers, and stator natural frequencies, these forces can be responsible for high magnetic noise levels during electrical starting and braking. A simple rule to avoid saturation magnetic noise is then proposed, and applied to an industrial motor. A fully analytical model of the motor vibro-acoustic behavior, including saturation effects, is finally presented. Simulation results show that the new proposed motor improves magnetic noise level up to 20 dB, whereas experiments give a 15 dB improvement.

It is very difficult to judge watermelon ripeness by external characteristics. The laser Doppler vibrometer (LDV) is a new approach to determination of fruit quality. This optical-mechanical technique was utilized for nondestructive detection of the vibration response of watermelons to predict ripeness. Finite element modeling (FEM) was used to find the optimum location for excitation and response measurement and to analyze the mode shapes. The model was considered based on red, white, and green tissues and included individual properties such as density and elasticity modulus. Modal analysis of the finite element model showed acceptable agreement between experimental results and finite element simulation. According to the mode shapes of watermelon, optimum locations for applying input vibrations and detecting output vibrations were suggested. Then watermelons were excited and their responses were recorded by LDV at the determined locations. The phase shift between input and output signals were extracted over a wide frequency range. The firmness of cut fruits was measured with penetrometer as a ripeness indicator. A regression model was developed to predict the internal texture firmness using phase shifts at statistically selected frequencies. The determination coefficients (R2) of the calibration and cross validation models were 0.9998 and 0.994 respectively.

Interactions between deformable composite structures and compressible multiphase flow are common for many marine/submarine problems. Recently, there has been an increased interest in the application of composite structures in the marine industry (e.g. propulsion system, ship hulls, marine platforms, marine turbines, etc) to take advantage their high stiffness to weight and strength to weight ratios, and high impact/shock resistance characteristics. It is therefore important to evaluate the performance of composite structures subject to dynamic loads. In this paper, a coupled Eulerian-Lagrangian numerical method is proposed to model the two-dimensional (2D) or axisymmetric response of deformable composite structures subject to shock and blast loads. The method couples an Eulerian compressible multiphase fluid solver with a general Lagrangian solid solver using an interface capturing method, and is validated using analytical, numerical, and experimental results. A 2D case study is shown for an underwater explosion beneath a three-layered composite structure with clamped ends. The importance of 2D fluid-structure interaction effects on the transient response between composite structures and compressible multiphase flow is discussed.

Being an alternative to conventional wired sensors, wireless sensor networks (WSNs) are extensively used in Structural Health Monitoring (SHM) applications. Most of the Structural Damage Detection (SDD) approaches available in the SHM literature are centralized as they require transferring data from all sensors within the network to a single processing unit to evaluate the structural condition. These methods are found predominantly feasible for wired SHM systems; however, transmission and synchronization of huge data sets in WSNs has been found to be arduous. As such, the application of centralized methods with WSNs has been a challenge for engineers. In this paper, the authors are presenting a novel application of 1D Convolutional Neural Networks (1D CNNs) on WSNs for SDD purposes. The SDD is successfully performed completely wireless and real-time under ambient conditions. As a result of this, a decentralized damage detection method suitable for wireless SHM systems is proposed. The proposed method is based on 1D CNNs and it involves training an individual 1D CNN for each wireless sensor in the network in a format where each CNN is assigned to process the locally-available data only, eliminating the need for data transmission and synchronization. The proposed damage detection method operates directly on the raw ambient vibration condition signals without any filtering or preprocessing. Moreover, the proposed approach requires minimal computational time and power since 1D CNNs merge both feature extraction and classification tasks into a single learning block. This ability is prevailingly cost-effective and evidently practical in WSNs considering the hardware systems have been occasionally reported to suffer from limited power supply in these networks. To display the capability and verify the success of the proposed method, large-scale experiments conducted on a laboratory structure equipped with a state-of-the-art WSN are reported.

This paper presents a methodology to locate and evaluate transversal damages in composite structures, based on natural frequency shifts due to damage. In previous researches the authors succeeded to contrive a relation between the decrease of the strain energy stored in a damaged slice and the frequency change due to that damage. It can be used to create patterns, uniquely characterizing the damage position along the beam, so that damage localization becomes a pattern recognition problem. While for beams with constant rigidity in healthy state these patterns are not dependent on the beam's cross-section shape or structure, the damage location algorithm can be used also for composites, like sandwich panels. Once the location known, the damage severity/depth can be extracted from the above mentioned relation. This damage assessment algorithm was validated by measurements on numerous sandwich panel specimens.

With the advent of high speed machining, to improve productivity, the dynamic performance of machine structures especially in precision machining becomes critical. Granite epoxy composite is a novel material being developed as an alternate material for precision machine tool beds. This composite consists of well-graded granite particles and Araldite resin with a suitable hardener for curing the mix at room temperature. Several distinct advantages like excellent damping properties, long term dimensional stability, less curing time leading to shortest lead time for manufacture, long term dimensional stability and lower production costs compared to conventional Cast iron beds can be derived from this composite. Objective of this study was to investigate experimentally effect of resin content on vibrational characteristics of granite epoxy composite.

In the context of intended expansion of cycling to contribute to rising the UK economy and public health, this research looks at whole-body vibration induced by cycling with aim to prevent regular cyclists from body fatigue in the short and long term.

The research reviewed the current literature in biodynamics, vibration in cycling with regards to the human body and bicycle parts, along with the relevant regulation and guidance.

The research used a number of bicycles ridden on test roads of different macrotextures and defects; the vertical acceleration was measured at the frame, seat-post and saddle.

The combinations of bicycles, road surfaces and measurement locations led to conclude that grades of road surfacing and saddles are the most important factors of variations of vibration amplitude.

The recommended daily exposure varies greatly with types of road surfaces and bicycles; there are no restrictions for cycling with a light aluminium frame on roads with no defects, while on a consistently rough roads, actions should be taken to reduce vibration with any bicycle over a minute of exposure, and the absolute limit of exposure varies from 2 min with a steel frame, to 22 min on a lighter aluminium frame.

Modes were observed from measurements taken at the saddle, which match the secondary body resonant frequencies and the natural frequencies of the head.

It was suggested that more research should be done to develop a comprehensive understanding of the interactions of the vibration filtering through the body form all entry points –pedals, saddle and handle bars-, at the same time and at all axes. Doing so would help derive weighting curves specific to the different body position over bicycles and body parts for adequate assessment of daily exposure.

It was also suggested that more research should be done to develop a comprehensive understanding of the interaction of the vibration within bicycle parts to develop bicycles as safe as possible with regards to vibration while maintaining best manoeuvrability.

A Chimney is a structure that is used for removing hazardous gases from furnace and from big industry plants to outdoor atmosphere. Chimneys are generally vertical structure as far as possible to make sure that the hazardous gases flow easily and quickly by taking air into the combustion. Industrial Chimneys are having greater heights and slender structures with circular cross-sections. The height of a chimney determines its capability to pass gases to the outside environment via stack effect. Also, the dispersion of hazardous gases at greater heights can minimize their effect on the immediate surroundings. The project is based on the design concepts of chimneys according to Indian codes provisions and analyse through finite element method. Different types of steel chimney models are made by varying its height, geometry and diameter. The main objective of this study is to perform vibration analysis of steel chimney for dynamic wind loads using different critical velocity. Natural frequency and time period has been found out using analysis in Ansys. All the models are modelled in the Ansys Software.

In this paper study has been done about vibration control methods of front loaded washing machine. Vibration problems are often encountered, both in everyday life like the heavy noise of an unbalanced washing machine, etc. excessive vibrations causes damage and wear on components it should be minimized the aim of vibration control is to reduce unwanted vibrations. The vibrations of washing machine during the spin cycle can shake the whole house, but it can be control with vibration isolation/dampening pads.
Keywords: Vibration control; Vibration; Forced vibration; Front loaded washing machine; Washer.

Prayer is not a psychoactive chant that may trigger a meditative mood or transfigure us into a mystic. It is a simple set of words that are metaphorically arranged which induces a state of being aware and conscious beyond the mundane. It makes an amendment between us and God and makes us to be aware of God, Its creation and the purpose of our existence. The Lords' Prayer indeed conditions us to know the reality beyond the personality of the mind.

This paper presents a simple method to obtain effects similar to those obtained by real mechanical loading and real inertia variation but without any mechanical parts supplementary to the electric motor of the studied electric drive. The electric motor itself produces the load torque and the inertia variation using digital signal processing software. Therefore, the electric drive is virtually torque and inertia loaded, while its behavior is similar to that of the actual loaded drive. The present method could be used to test the implementation of control algorithms or for didactic purposes using motion control kits found on the market. The present method is used with laboratory works of the DSP Fundamentals in Power Electronics course at the Department of Electrical and Computer Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel.

This first part of a two-part paper on the John A. Roebling suspension bridge ͑1867͒ across the Ohio River is an analytical investigation, whereas Part II focuses on the experimental investigation of the bridge. The primary objectives of the investigation are to assess the bridge's load-carrying capacity and compare this capacity with current standards of safety. Dynamics-based evaluation is used, which requires combining finite-element bridge analysis and field testing. A 3D finite-element model is developed to represent the bridge and to establish its deformed equilibrium configuration due to dead loading. Starting from the deformed configuration, a modal analysis is performed to provide the frequencies and mode shapes. Transverse vibration modes dominate the low-frequency response. It is demonstrated that cable stress stiffening plays an important role in both the static and dynamic responses of the bridge. Inclusion of large deflection behavior is shown to have a limited effect on the member forces and bridge deflections. Parametric studies are performed using the developed finite-element model. The outcome of the investigation is to provide structural information that will assist in the preservation of the historic John A. Roebling suspension bridge, though the developed methodology could be applied to a wide range of cable-supported bridges.

Adjustable balancers are useful in applications where rotational imbalance is frequently varied. For example, in media level servo track writers used in the hard disk drive industry, a set of blank disks is loaded on a spindle motor for the purpose of servo writing. Since servo writing is performed at high speeds, imbalance introduced by disks and spacers results in significant vibrations that can affect the quality of the servo writing process. This paper proposes a new configuration of adjustable balancer that enables to compensate for rotational imbalance each time a new set of blank disks is loaded into the servo track writing machine. The adjustable balancer is ring shaped with a number of grooves displaced around axis of rotation. Steel balls are placed inside the grooves and held by permanent magnets. Imbalance compensation is achieved by electromagnetically activated release of the steel balls. The main advantage of the proposed configuration is its large compensation range. Presented three-dimensional finite-element analysis results and experimental results demonstrate and prove the effectiveness of this novel configuration.

Throughout the living and non-living world we find patterns of recurrent rhythms and periodic systems in which everything exists in a state of continual vibration, oscillation and pulsation. These rhythmic patterns can be observed not only in the beating of the heart, the circulation of the blood and the inhaling and exhaling of breathing, but also in the recurrent formation of cells and tissues, in the rhythmic movements of the oceans, the wave motion of sound and hypersonic vibrations, and in the vast universe extending from the cosmic systems of solar systems and galaxies down to the infinitesimal world of atomic and nuclear structures. In the following article. Dr. Hans Jenny, a Swiss scientist and artist, describes some of the experiments he has carried out in a long study of these rhythmic vibrations and presents some of the extraordinary results which this new field he has termed "Cymatics" (from the Greek kyma, wave) already reveals to us. Dr. Jenny believes that these experiments will give us new insight into the world of vibrations
by Dr. Hans Jenny
Photos J. Christiaan Stuten terrestial and extra-terrestialand eventually serve fields of research as
HansPeterWidmer diverseasastrophysicsandbiology.

Modeling of shells integrated with smart lamina and taking account of thermo-magneto-electro-elastic fields represents a challenge to be formulated and solved. In the present work, analytical model is proposed based on Hamilton's variational principle linked with Gibbs free energy functions. The model is casted according to the first-order shear deformation shell theory. The exact solution is derived for linearly constitutive properties, simply supported, shallow shell having rectangular plane-form under static loadings. The effects of the material properties, lay-ups of the constituent layers, and shell parameters on the free vibration behavior are investigated and analyzed. The accurate treatment of thermal, magnetic, electric, and elastic energies that are taken into account in this smart shell yields rather sophisticated equations for magnetic inductions, electric displacements and stress resultants. Therefore, the introduced model is expected to provide a foundation to inv...

Vibration is an oscillation wherein the quantity is a parameter that defines the motion of a mechanical system. The main causes of vibration are unbalanced forces in the machine, dry friction between the mating surfaces, external excitation, earthquakes, wind self-excited vibrations, misalignment of rotating shaft, looseness in rotating machinery, loose foundations and excessive bearing clearances, oil whirl in bearing. The harmful effects of vibrations are excessive stresses in machine parts and undesirable noise. Also due to high vibration there are looseness of parts and partial or complete failure of parts. This vibration phenomenon is used in some musical instruments, vibrating conveyors, shakers, vibrating screens, stress relieving. This vibration can be reduced by removing the causes of vibration, by vibration isolation. Also vibration can be controlled by using shock absorbers and by installing dynamic vibration absorbers. Using composite material also vibration reduce. Automobile suspension Leaf spring consist high vibration during motion. By binding the composite material to steel spring the vibration can be reduced. ANSYS software used for Finite Element Analysis for vibration analysis.

System identification plays a crucial role in structural dynamics and vibro-acoustic system optimization. The followed approach is based on the “Modal Analysis” concept. The Eigenmodes of the system model can be visualized and allow a direct physical interpretation. Using the modal models, design improvements can be predicted and the structure optimized. The present paper not only reviews the test procedure

Om Mani Padme Hum is a six syllable mantra in Tibetian Buddhism associated with the bodhisattva – Avalokitesvara. This mantra as known by the Buddhist generates positive energies within the body through mystical vibrations and frequencies when chanted repeatedly. The mantra has shown enhanced cognitive effects in organisms without auditory apparatus where the interaction is assumed to be taking place at a cellular and biochemical level (Pereira 2015a, b; Pereira 2016a,b). Based on the results of these studies, this paper evaluates the frequencies associated with each syllable of the mantra comparing it to therapeutic/healing effects that have been known or studied for some frequencies by holistic healers, meditators and non-invasive medical practitioners.The study confirms that the mantra Om Mani Padme Hum is made up of frequencies that are known to generate powerful vibrations when chanted. These vibrations during chanting are presumedto be creating a resonance effect,as a result offormation of constructive interference patterns between the frequencies of each syllable which maybe the reason this chant exhibits a therapeutic/ healing effect on the body and its functions.