Journal articles: 'Dynamic Vibration Absorber'

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Hu, Jia Lin, and Giuseppe Habib. "Friction-Induced Vibration Suppression via the Tuned Mass Damper: Optimal Tuning Strategy." Lubricants 8, no. 11 (November 20, 2020): 100. http://dx.doi.org/10.3390/lubricants8110100.

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Friction-induced vibrations are a significant problem in various engineering applications, while dynamic vibration absorbers are an economical and effective tool for suppressing various kinds of vibrations. In this study, the archetypal mass-on-moving-belt model with an attached dynamic vibration absorber was considered. By adopting an analytical procedure, the optimal tuning of the absorber’s parameters was defined. Furthermore, the bifurcations occurring at the loss of stability were analytically investigated; this analysis illustrated that a properly chosen nonlinearity in the absorber’s stiffness permits controlling the supercritical or subcritical character of the bifurcation. However, a numerical analysis of the system’s dynamics, despite confirming the analytical results, also illustrated that the system’s global behavior is only slightly affected by the bifurcation character. Indeed, a dynamic vibration absorber possessing a perfectly linear restoring force function seems to provide the optimal performance; namely, it minimizes the velocity range for which stick–slip oscillations exists.

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Zhu, Xuezhi, Zhaobo Chen, and Yinghou Jiao. "Optimizations of distributed dynamic vibration absorbers for suppressing vibrations in plates." Journal of Low Frequency Noise, Vibration and Active Control 37, no. 4 (August 15, 2018): 1188–200. http://dx.doi.org/10.1177/1461348418794563.

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Dynamic vibration absorber is an ideal device for vibration control at specific frequencies. In order to get a robust vibration control performance, multiple or distributed dynamic vibration absorbers are usually used for suppressing vibrations in plate structures. Optimization methods for the single dynamic vibration absorber in various vibration systems had been proposed many years ago. However, the analytical optimization solutions with respect to the distributed dynamic vibration absorbers for the plate structures have not been found. In this paper, the optimization problems of the distributed dynamic vibration absorbers for suppressing vibrations in plates are studied. Vibration equations of the plate carrying distributed dynamic vibration absorbers are established using modal superposition method. The similarities of vibration shapes of the dynamic vibration absorbers and mode shapes of the plate are revealed. According to the characteristics of the vibration shapes of dynamic vibration absorbers, the vibration equations of the plate carrying distributed dynamic vibration absorbers are transformed into a form of equations of a two degree of freedom system. The analytical optimization formulas of the distributed dynamic vibration absorbers for suppressing vibrations in plates are derived by applying the fixed-points theory. The effectiveness of the optimization formulas is verified through numerical simulations. The simulation results also show that a brilliant multi-mode vibration control can be realized by using the optimized distributed dynamic vibration absorbers.

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Kondo, Kiyoshi. "Dynamic vibration absorber." Journal of the Acoustical Society of America 84, no. 5 (November 1988): 1961. http://dx.doi.org/10.1121/1.397144.

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Heidari, Hamidreza, and Behnam Monjezi. "Vibration control of imbalanced Jeffcott rotor by virtual passive dynamic absorber with optimal parameter values." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 232, no. 23 (January 8, 2018): 4278–88. http://dx.doi.org/10.1177/0954406217752024.

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Today, dynamic absorbers are widely used to control vibrations of the systems that are being excited by the harmonic forces. In this paper, the usage of the magnetic force as virtual dynamic absorber for vibration control in rotary systems is investigated. In order to examine this new method, two different types of passive dynamic absorber systems are applied to control imbalanced Jeffcott rotor vibrations. In the first type of the absorber system, damper is located between the absorber mass and the disk and in the second type, it is located between the absorber mass and the ground. Then, the optimal parameters of absorber system, stiffness and damping have been analytically achieved by using two fixed points theory. Moreover, for further reduction of the vibration amplitude, combined paths have been designed for rotor frequency response. Finally, in order to evaluate the obtained results, the experimental data of our virtual dynamic absorbers were compared with simulation results and it is found that the vibration amplitude of rotor was efficiently limited in this case. Furthermore, the second type of the absorber system with equal mass ratio to the first type of the absorber system was more efficient than the first one in reduction of the amplitude of vibrations. Our findings show that the second absorber transfer more force than the first one since the second absorber connects chasis of system with damper. Therefore, it is recommended to apply the first absorber after the first resonance.

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Xu, Qi, Junkai Niu, Hongliang Yao, Lichao Zhao, and Bangchun Wen. "Nonlinear dynamic behavior and stability of a rotor/seal system with the dynamic vibration absorber." Advances in Mechanical Engineering 11, no. 1 (January 2019): 168781401881957. http://dx.doi.org/10.1177/1687814018819578.

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The dynamic vibration absorbers have been applied to attenuate the critical or unbalanced vibration but may create the fluid-induced vibration instability in the rotor/seal system. The major purpose of this study is devoted to the effects of the dynamic vibration absorber on the nonlinear dynamic behavior and stability of the fluid-induced vibration in the rotor/seal system. The dynamic vibration absorber is attached on the shaft in the perpendicular directions. The model of the rotor/seal-dynamic vibration absorber system is established as the modified Jeffcott rotor system, and Muszynska nonlinear seal force is applied. The numerical method is used for the dynamic behavior analysis. The effects of the natural frequency and damping ratio of the dynamic vibration absorber on the dynamic behavior are discussed. The stability of the rotor/seal-dynamic vibration absorber system is judged by the eigenvalue theory. The variations of the instability threshold with the parameters of the dynamic vibration absorber are obtained. The results show that the instability threshold and instability vibration frequency are changed by the dynamic vibration absorber. The parameters of the dynamic vibration absorber must be selected carefully to avoid reducing the instability threshold and causing the instability vibration to occur in advance when the dynamic vibration absorber is applied to attenuate the critical or unbalanced vibration of the rotor/seal system.

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Xu, Qi, Junkai Niu, Hongliang Yao, Lichao Zhao, and Bangchun Wen. "Fluid-Induced Vibration Elimination of a Rotor/Seal System with the Dynamic Vibration Absorber." Shock and Vibration 2018 (December 2, 2018): 1–15. http://dx.doi.org/10.1155/2018/1738941.

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The dynamic vibration absorbers have been applied to attenuate the rotor unbalance and torsional vibrations. The major purpose of this paper is to research the elimination of the fluid-induced vibration in the rotor/seal system using the absorber. The simplified rotor model with the absorber is established, and the Muszynska fluid force model is employed for the nonlinear seal force. The numerical method is used for the solutions of the nonlinear differential equations. The nonlinear responses of the rotor/seal system without and with the absorber are obtained, and then the rotating speed ranges by which the fluid-induced instability can be eliminated completely and partially are presented, respectively. The absorber parameters ranges by which the instability vibration can be eliminated completely and partially are obtained. The results show that the natural frequency vibration due to the fluid-induced instability in the rotor/seal system can be eliminated efficiently using the absorber. The appropriate natural frequency and damping ratio of the absorber can extend the complete elimination region of the instability vibration and postpone the occurrence of the instability vibration.

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Wang, B. P., L. Kitis, W. D. Pilkey, and A. Palazzolo. "Synthesis of Dynamic Vibration Absorbers." Journal of Vibration and Acoustics 107, no. 2 (April 1, 1985): 161–66. http://dx.doi.org/10.1115/1.3269239.

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A method for designing dynamic vibration absorbers which create antiresonances at specified points on a sinusoidally forced vibratory system is described. Spring-mass absorber systems are treated in detail. Among all possible solutions, a unique minimum mass solution is shown to exist if the relative displacement of the absorber mass is constrained. The sensitivity of the design to variations in frequency, spring constant, and absorber mass is discussed. The procedure is illustrated by numerical results for a simply supported uniform beam.

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Kari, Leif. "Are Single Polymer Network Hydrogels with Chemical and Physical Cross-Links a Promising Dynamic Vibration Absorber Material? A Simulation Model Inquiry." Materials 13, no. 22 (November 13, 2020): 5127. http://dx.doi.org/10.3390/ma13225127.

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Tough, doubly cross-linked, single polymer network hydrogels with both chemical and physical cross-links display a high loss factor of the shear modulus over a broad frequency range. Physically, the high loss factor is resulting from the intensive adhesion–deadhesion activities of the physical cross-links. A high loss factor is frequently required by the optimization processes for optimal performance of a primary vibration system while adopting a dynamic vibration absorber, in particular while selecting a larger dynamic vibration absorber mass in order to avoid an excess displacement amplitude of the dynamic vibration absorber springs. The novel idea in this paper is to apply this tough polymer hydrogel as a dynamic vibration absorber spring material. To this end, a simulation model is developed while including a suitable constitutive viscoelastic material model for doubly cross-linked, single polymer network polyvinyl alcohol hydrogels with both chemical and physical cross-links. It is shown that the studied dynamic vibration absorber significantly reduces the vibrations of the primary vibration system while displaying a smooth frequency dependence over a broad frequency range, thus showing a distinguished potential for the tough hydrogels to serve as a trial material in the dynamic vibration absorbers in addition to their normal usage in tissue engineering.

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Chen, Jie, Yangjun Wu, Xiaolong He, Limin Zhang, and Shijie Dong. "Suspension parameter design of underframe equipment considering series stiffness of shock absorber." Advances in Mechanical Engineering 12, no. 5 (May 2020): 168781402092264. http://dx.doi.org/10.1177/1687814020922647.

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In this article, a vertical rigid–flexible coupling model between the vehicle and the equipment is established. Considering the series stiffness of hydraulic shock absorbers, the underframe equipment is like a three-element-type Maxwell model dynamic vibration absorber. The carbody is approximated by an elastic beam and the three-element-type dynamic vibration absorber for general beam system was studied by fixed-point theory. The analytical solution of the optimal suspension parameters for the beam system subjected to harmonic excitation is obtained. The dynamic vibration absorber theory is applied to reduce the resonance of the carbody and to design the suspension parameters of the underframe equipment accordingly. Then, the railway vehicle model was established by multi-body dynamics simulation software, and the vibration levels of the vehicle at different speeds were calculated. A comparative analysis was made between the vehicles whose underframe equipment was suspended by the three-element-type dynamic vibration absorber model and the Kelvin–Voigt-type dynamic vibration absorber model, respectively. The results show that, compared with the vehicle whose underframe equipment is suspended by the Kelvin–Voigt-type dynamic vibration absorber model, the vehicle whose underframe equipment is suspended by the three-element-type dynamic vibration absorber model can achieve a much better ride quality and root mean square value of the vibration acceleration of the carbody. The carbody elastic vibration can be reduced and the vehicle ride quality can be improved effectively using the designed absorber.

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Aida, T., K. Kawazoe, and S. Toda. "Vibration Control of Plates by Plate-Type Dynamic Vibration Absorbers." Journal of Vibration and Acoustics 117, no. 3A (July 1, 1995): 332–38. http://dx.doi.org/10.1115/1.2874455.

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In this paper, a new plate-type dynamic vibration absorber is presented for controlling the several predominant modes of vibration of plate (mainplate) under harmonic excitation, which consists of a plate (dynamic absorbing plate) under the same boundary condition as the main plate and with uniformly distributed connecting springs and dampers between the main and dynamic absorbing plates. Equations of motion of the system in the modal coordinates of the main plate become equal to those of the two-degrees-of-freedom system with two masses and three springs. Formulas for optimum design of the plate-type dynamic vibration absorber are presented using the optimum tuning method of a dynamic absorber in two-degrees-of-freedom system, obtained by the Den Hartog method. Moreover, for practical problems regarding large-scale plates, an approximate tuning method of the plate-type dynamic absorbers with several sets of concentrated connecting springs and dampers is also presented. The numerical calculations demonstrate the effectiveness of the plate-type dynamic absorbers.

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Sun, Qian, Yongpeng Wen, and Yu Zou. "Study on the Vibration Suppression Method of Urban Railway Vehicles Based on a Composite Dynamic Vibration Absorber." MATEC Web of Conferences 296 (2019): 01010. http://dx.doi.org/10.1051/matecconf/201929601010.

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To reduce the bounce and the pitch vibration of carbody, a vertical dynamic model for urban rail vehicles is established to analyze the vibration response of the carbody in the low frequency range. In this paper, different methods of single-degree-of-freedom dynamic vibration absorber to suppress the vibration for carbody are investigated. The limits of single-degree-of-freedom dynamic vibration absorber to the vibration reduction effect of carbody are pointed out. After that, the design of a composite dynamic vibration absorber including a double oscillator structure is introduced. A vibration discreteness index is used to evaluate dynamic vibration absorbers with various designs for the vibration damping performance. Finally, the vibration reduction performance of the composite dynamic vibration absorber is verified by Sperling’s riding index. The results demonstrate that the performance of the single degree of freedom dynamic vibration absorber attached to a carbody may increase the vibration within a partial scope, when the peak frequency of vibration is far away from the design frequency. The installation of the composite dynamic vibration absorber vibration provides gentler running experience for passengers.

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Borges, R. A., A. M. G. de Lima, and V. Steffen Jr. "Robust Optimal Design of a Nonlinear Dynamic Vibration Absorber Combining Sensitivity Analysis." Shock and Vibration 17, no. 4-5 (2010): 507–20. http://dx.doi.org/10.1155/2010/587502.

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Dynamic vibration absorbers are discrete devices developed in the beginning of the last century used to attenuate the vibrations of different engineering structures. They have been used in several engineering applications, such as ships, power lines, aeronautic structures, civil engineering constructions subjected to seismic induced excitations, compressor systems, etc. However, in the context of nonlinear dynamics, few works have been proposed regarding the robust optimal design of nonlinear dynamic vibration absorbers. In this paper, a robust optimization strategy combined with sensitivity analysis of systems incorporating nonlinear dynamic vibration absorbers is proposed. Although sensitivity analysis is a well known numerical technique, the main contribution intended for this study is its extension to nonlinear systems. Due to the numerical procedure used to solve the nonlinear equations, the sensitivities addressed herein are computed from the first-order finite-difference approximations. With the aim of increasing the efficiency of the nonlinear dynamic absorber into a frequency band of interest, and to augment the robustness of the optimal design, a robust optimization strategy combined with the previous sensitivities is addressed. After presenting the underlying theoretical foundations, the proposed robust design methodology is performed for a two degree-of-freedom system incorporating a nonlinear dynamic vibration absorber. Based on the obtained results, the usefulness of the proposed methodology is highlighted.

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Habib, Giuseppe, Fanni Kádár, and Bálint Papp. "Impulsive vibration mitigation through a nonlinear tuned vibration absorber." Nonlinear Dynamics 98, no. 3 (November 2019): 2115–30. http://dx.doi.org/10.1007/s11071-019-05312-y.

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Abstract The dynamics of a nonlinear passive vibration absorber conceived to mitigate vibrations of a nonlinear host structure is considered in this paper. The system under study is composed of a primary system, consisting of an undamped nonlinear oscillator of Duffing type, and a nonlinear dynamic vibration absorber, denominated nonlinear tuned vibration absorber (NLTVA). The NLTVA consists of a small mass, attached to the host structure through a linear damper, a linear and a cubic spring. The host structure is subject to free vibrations and the performance of the NLTVA is evaluated with respect to the minimal time required to dissipate a specific amount of the mechanical energy of the system. In order to characterize the dynamics of the system, a combination of numerical and analytical techniques is implemented. In particular, on the basis of the first-order reduced model, slow invariant manifolds of the transient dynamics are identified, which enable to estimate the absorber performance. Results illustrate that two different dynamical paths exist and the system can undergo either of them, depending on the initial conditions and on the value of the absorber nonlinear stiffness coefficient. One path leads to a very fast vibration mitigation, and therefore to a favorable behavior, while the other one causes a very slow energy dissipation.

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Viet, LD. "Sequential design of two orthogonal dynamic vibration absorbers in a pendulum based on stability maximization." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 226, no. 11 (February 7, 2012): 2645–55. http://dx.doi.org/10.1177/0954406212437302.

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A dynamic vibration absorber moving in the tangential or in the normal direction of a pendulum’s orbit can reduce the free vibration of the pendulum. This article discusses the problem of a pendulum structure attached with two dynamic vibration absorbers moving orthogonally at the same time. The analytical optimization is proposed to be done in two steps, in which the parameters of the linear dynamic vibration absorber moving in tangential direction and the non-linear dynamic vibration absorber moving in normal direction are chosen sequentially based on the stability maximization criterion. The analytical analysis shows that the two-dynamic vibration absorber scheme has small benefit in comparison with the single-dynamic vibration absorber scheme. The analytical conclusions are verified by numerical calculations. Although the conclusion of the article is unexpected, it is important in practice because the two-dynamic vibration absorber arrangement can be excluded in the design.

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Kernytskyy, Ivan, Serhii Baranovych, Serhii Berezovetskyi, Bohdan Diveyev, Orest Horbay, and Ihor Stukalets. "Vibration absorber optimization for boom-sprayer." Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 27, no. 4 (January 10, 2019): 504–15. http://dx.doi.org/10.22630/pniks.2018.27.4.47.

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The main task of this work is to analyze optimal design-system of the booms of boom-sprayers. The discrete-continue models of machines dynamics of such wheeled machines as boom-sprayer with elongated boom element with the attachment of dynamic vibration absorbers are offered. The algorithms for vibration decreasing of boom are received. The new vibroabsorbing elements are proposed. The paper contemplates the provision of dynamic vibration absorbers (DVA) of buffered impact masses and particle type. Such originally designed absorbers reduce vibration selectively in maximum vibration mode, without introducing vibration in other modes. The damping results from the exchange of momentum during impacts among the masses and masses and stops as the structure vibrates. A technique is developed to give the optimal DVA’s as single degree of freedom (SDOF) buffered system. The one-digit values are established not only for the dynamic vibration absorber parameters, but also for mechanical parameter of base structure – boom in connection points of the dynamic vibration absorbers. Finally, present research develops the genetic algorithms for optimal design searching by discrete-continuum DVA’s system – base system modeling.

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Sayyad, F. B., and N. D. Gadhave. "Study of Magnetic Vibration Absorber with Permanent Magnets along Vibrating Beam Structure." Journal of Structures 2013 (June 5, 2013): 1–5. http://dx.doi.org/10.1155/2013/658053.

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The vibration absorbers are frequently used to control and minimize excess vibration in structural system. Dynamic vibration absorbers are used to reduce the undesirable vibration in many applications such as pumps, gas turbines, engine, bridge, and electrical generator. To reduce the vibration of the system, the frequency of absorber should be equal to the excitation frequency. The aim of this study is to investigate the effect of magnetic vibration absorber along vibrating cantilever beam. This study will aim to develop a position of magnetic vibration absorber along the cantilever beam to adopt the change in vibratory system. The absorber system is mounted on a cantilever beam acting as the primary system. The objective is to suppress the vibration of the primary system subjected to a harmonic excitation whose frequencies are varying. It can be achieved by varying the position of magnetic vibration absorber along the length of beam. The advantage of magnetic vibration absorber is that it can be easily tuned to the excitation frequency, so it can be used to reduce the vibration of system subjected to variable excitation frequency.

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Ball, James H., Pradip N. Sheth, and Keith E. Rouche. "Damped dynamic vibration absorber." Journal of the Acoustical Society of America 80, no. 4 (October 1986): 1280. http://dx.doi.org/10.1121/1.394448.

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Tambe, U. V., G. Chandrasekharappa, and H. R. Srirangarajan. "Voigt dynamic vibration absorber." Journal of Sound and Vibration 124, no. 2 (June 1988): 381–84. http://dx.doi.org/10.1016/s0022-460x(88)80195-0.

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Vukorpa, Victor M. "Tuned dynamic vibration absorber." Journal of the Acoustical Society of America 102, no. 6 (1997): 3246. http://dx.doi.org/10.1121/1.420156.

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Peng, Chao, and Xing Long Gong. "Active-Adaptive Vibration Absorbers and its Vibration Attenuation Performance." Applied Mechanics and Materials 312 (February 2013): 262–67. http://dx.doi.org/10.4028/www.scientific.net/amm.312.262.

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To improve the working frequency band and the damping effect of vibration absorber, an active-adaptive vibration absorber (AAVA) was presented. The AAVA can be considered as the integration of adaptive tuned vibration absorber (ATVA) and active vibration absorbers (AVA). The principle and the dynamic character of the proposed AAVA were theoretically analyzed. Based on the analysis, a prototype was designed and manufactured. Its dynamic properties and vibration attenuation performances were experimentally investigated. The experimental results demonstrated that the damping ratio of the prototype was significantly reduced by the active force. Consequently, its vibration attenuation capability was significantly improved compared with the ATVA.

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Khang, Nguyen Van, Vu Duc Phuc, Nguyen Thi Van Huong, and Do The Duong. "Optimal control of transverse vibration of Euler-Bernoulli beam with multiple dynamic vibration absorbers using Taguchi's method." Vietnam Journal of Mechanics 40, no. 3 (September 24, 2018): 265–83. http://dx.doi.org/10.15625/0866-7136/11366.

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Vibration absorbers are frequently used to suppress the excessive vibrations in structural systems. In this paper, an imposing nodes technique is applied for vibration suppression of Euler-Bernoulli beams subjected to forced harmonic excitations by means of multiple dynamic vibration absorbers. A procedure based on Taguchi's method is proposed to determine the optimum absorber parameters to suppress the vibration amplitude of the beams. Numerical tests are performed to show the effectiveness of the proposed procedure.

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Zainulabidin, Muhd Hafeez, and N. Jaini. "Vibration Analysis of a Beam Structure Attached with a Dynamic Vibration Absorber." Applied Mechanics and Materials 315 (April 2013): 315–19. http://dx.doi.org/10.4028/www.scientific.net/amm.315.315.

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In this paper the transverse vibration of a fixed-fixed end beam will be investigated by experimental measurement. This paper is concerned with the classical theory formula as well as the analysis and design of the dynamic vibration absorber (DVA) which is composed by a flexible beam with two masses symmetrically mounted at its both sides. The fixed end beam clamped to a static structure where dynamic vibration absorber then being attached onto it. One side of end of the beam is harmonically excited in transversal direction by an electric shaker. The structure equipped with accelerometer sensor to measure its vibration response amplitudes and natural frequencies. The dynamic vibration absorber arrangement located under motor near the beam end was then being vibrated and done in two conditions; before and after mounting dynamic vibration absorber. The comparison amplitudes before and after equipped dynamic vibration absorber were compared and discussed. From the experimental results, proved that the DVA has successfully absorbed the beam vibration hence reduced the vibration amplitude of the beam structure. The knowledge and result obtained from this study can help engineers control the vibration level of beam structure.

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HASEGAWA, Shin, and Hiroshi YABUNO. "Vibration absorber characteristics of linear dynamic vibration absorber and autoparametric resonance absorber." Proceedings of Conference of Kanto Branch 2019.25 (2019): 19G20. http://dx.doi.org/10.1299/jsmekanto.2019.25.19g20.

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Sheth, Anant J., Pratikkumar Rajendralal Parmar, Brijesh L. Solanki, Nirav Sailor, Bhavin P. Gohil, and Harshitkumar A. Patel. "Vibration Control of Slab Breaker Machine by Passive Dual Mass Tuned Vibration Absorber." Applied Mechanics and Materials 592-594 (July 2014): 2112–16. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.2112.

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Tuned Vibration Absorber (TVA) is the best solution available to control/suppress vibrations of any dynamic systems. Dual mass Tuned Vibration Absorber are designed and implemented for the vibration control. Though the slab barker machine is operating at various natural frequencies, the Dual mass TVA can be designed to mitigate the vibrations depending on the position of mass. The experiments were carried out for various locations of mass. And it is found that the vibration /shock waves of slab breaker machine are absorbed by using a passive TVA system. By keeping the operating condition same it is practically found that at the location of 4cm the optimal vibration reduction obtained and the amplitude is found to be reduced by 37 %.

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Shaw, Steven W., Peter M. Schmitz, and Alan G. Haddow. "Tautochronic Vibration Absorbers for Rotating Systems." Journal of Computational and Nonlinear Dynamics 1, no. 4 (April 15, 2006): 283–93. http://dx.doi.org/10.1115/1.2338652.

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This paper describes an analytical and experimental investigation of the dynamic response and performance of a special type of centrifugal pendulum vibration absorber used for reducing torsional vibrations in rotating systems. This absorber has the property that it behaves linearly out to large amplitudes, and thus experiences no frequency detuning. Previous analytical work on such tautochronic absorbers has considered the response, dynamic stability, and performance of single- and multi-absorber systems. In particular, it is known that these absorbers, when perfectly tuned to the order of the applied torque, do not exhibit hysteretic jumps in the response, but multi-absorber systems can experience instabilities that destroy the symmetry of their synchronous response. In this work we extend the theory to include linear de-tuning of the absorbers, which can be used as a design parameter to influence absorber performance, both in terms of rotor vibration reduction and operating range. This paper reviews the basic analysis, which employs scaling and averaging, and extends it to include the detuning. In addition, systematic experiments of systems with one and two absorbers are carried out. The experimental results are unique in that the test facility is capable of varying the excitation order, thereby allowing one to obtain order-response curves that are useful for design purposes. The experimental results are found to be in excellent agreement with the analytical predictions, and these clearly demonstrate the tradeoffs faced when selecting absorber tuning.

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Mizuno, Takeshi, Kazuya Kitajima, and Kenji Araki. "Balancing Machine Using Dynamic Vibration Absorber. Measurement with an Undamped Dynamic Vibration Absorber." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 582 (1995): 519–24. http://dx.doi.org/10.1299/kikaic.61.519.

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Anh, ND, and NX Nguyen. "Design of non-traditional dynamic vibration absorber for damped linear structures." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 1 (March 27, 2013): 45–55. http://dx.doi.org/10.1177/0954406213481422.

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The Voigt-type of dynamic vibration absorber is a classical model and has attracted considerable attention in many years because of its simple design, high reliability and useful applications in the fields of civil and mechanical engineering. Recently, a non-traditional type of dynamic vibration absorber was proposed. Unlike the traditional damped absorber configuration, the non-traditional absorber has a linear viscous damper connecting the absorber mass directly to the ground instead of the main mass. There have been some studies on the design of the non-traditional dynamic vibration absorber in the case of undamped primary structures. Those studies have shown that the non-traditional dynamic vibration absorber has better performance than the traditional dynamic vibration absorber. However, when damping is present at the primary system, there are very few studies on the design of non-traditional dynamic vibration absorber. This article presents a simple approach to determine the approximate analytical solutions for the [Formula: see text] optimization of the non-traditional dynamic vibration absorber attached to the damped primary structure subjected to force excitation. The main idea of the study is based on the dual criterion suggested by Anh in order to replace approximately the original damped structure by an equivalent undamped structure. Then the approximate analytical solution of dynamic vibration absorber’s parameters is given by using known results for undamped structure obtained. The comparisons have been done to verify the effectiveness of the obtained results.

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Miyake, Kazuo. "Vibration absorber with dynamic damper." Journal of the Acoustical Society of America 123, no. 4 (2008): 1822. http://dx.doi.org/10.1121/1.2909033.

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Fosdick, R., and Y. Ketema. "A Thermoviscoelastic Dynamic Vibration Absorber." Journal of Applied Mechanics 65, no. 1 (March 1, 1998): 17–24. http://dx.doi.org/10.1115/1.2789023.

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A dynamic vibration absorber with a viscoelastic element is studied. The viscoelastic element is modeled as a material with memory in which the internal dissipative force depends on current, as well as previous deformations. The viscoelastic behavior is governed by two parameters: the relaxation modulus Go, and the relaxation time γ. We apply the principle of time-temperature superposition to affect a dependence of the relaxation time γ on temperature. This temperature dependence can be used to tune a vibration absorber so as to be effective at more than one excitation frequency.

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Liu, Linya, Bin Zhang, and Jin Wang. "Rail Dynamic Vibration Absorber Design and Vibration Reduction Analysis." Noise & Vibration Worldwide 42, no. 11 (December 2011): 15–19. http://dx.doi.org/10.1260/0957-4565.42.11.15.

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The rail between two adjacent fasteners is regarded as the research object, and the rail is simplified as the main vibration system of undamped single degree of freedom, which supports the elastic components. The dynamic vibration absorber is simplified as a spring and damped system of 3-DOF(three degrees of freedom), to establish a mathematical model of rail dynamic vibration absorber. Through relevant theories, the parameter values of dynamic vibration absorber can be deduced when it achieves the best absorption effect. In accordance with the parameters, the scantlings of the structure of the dynamic vibration absorber can also be designed. Through the finite element software, the finite element model CRTS _ Ballastless Track system is established; with consideration of the value of irregularity, we load it variously. Analysis results showed that: compared to the rail and track where the dynamic vibration absorber is not installed, the maximum vertical displacement of the rail and track where a dynamic vibration absorber is installed was reduced by 65% and 67% respectively, the maximum vertical acceleration decreased by 75% and 70% and around, which reveals that the rail dynamic vibration absorber has a good vibration-reducing effect.

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Wen, Yongpeng, Qian Sun, Yu Zou, and Haoming You. "Study on the vibration suppression of a flexible carbody for urban railway vehicles with a magnetorheological elastomer-based dynamic vibration absorber." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 234, no. 7 (July 23, 2019): 749–64. http://dx.doi.org/10.1177/0954409719865370.

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Magnetorheological elastomer is a new kind of intelligent material that mainly incorporates micron-sized ferromagnetic particles into a polymer. A dynamic vibration absorber that is based on the controllable shear modulus of magnetorheological elastomer is widely used in vibration systems. In the study, a flexible carbody model with a magnetorheological elastomer dynamic vibration absorber is established. A design method of a semiactive dynamic vibration absorber that is based on magnetorheological elastomer is introduced, and the operational principle of the semiactive dynamic vibration absorber is also discussed. To improve the vibration absorption performance of the magnetorheological elastomer dynamic vibration absorber, via multiple regression analysis, the optimal design frequency expressions for both the rigid vibration and the elastic vibration of the carbody are fitted. Parameter determination for the magnetorheological elastomer dynamic vibration absorber is investigated in detail. Then, the effects on the rigid vibration and the elastic vibration with the magnetorheological elastomer vibration absorber both with the passive vibration absorber and without a vibration absorber are analyzed. Finally, Sperling’s riding index is used to evaluate the feasibility and the performance of the magnetorheological elastomer dynamic vibration absorber in a practical application. The results demonstrate that the vibration of the carbody can be effectively reduced by using the magnetorheological elastomer dynamic vibration absorber instead of the dynamic vibration absorber without the magnetorheological elastomer. The magnetorheological elastomer dynamic vibration absorber that is modified by the optimum frequency provides superior vibration reduction performance and improves the riding quality of the railway vehicle.

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Pan, Gong Yu, and Ying Zhang. "Research of Two-Series-Mass Dynamic Vibration Absorber and it’s Application on Building Vibration Control." Advanced Materials Research 368-373 (October 2011): 146–49. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.146.

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Multiplexing the dynamic vibration absorber (DVA) has tried for improving the vibration absorption efficiency of the dynamic vibration absorber, and because there are several tuning vibration frequencies in the multi-mass dynamic vibration absorber system, the vibration absorption efficiency is more excellent than a conventional single-mass dynamic vibration absorber when they are in the same total mass ratio. In this paper, a two-series-mass dynamic vibration absorber was proposed, optimal parameters of the two-series-mass dynamic vibration absorber have been calculated and vibration absorption is analyzed with the simulation and experiment. The results show that the two-series-mss dynamic vibration absorber can improve vibration absorption, in the same total mass ratio, by about 20% above that of a conventional single-mass dynamic vibration absorber. Based on the above optimal results, the two-series-mass dynamic vibration was used for vibration control on high building, and the practical measure result shows its effectiveness.

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Wang, Y. R., and C. Y. Lo. "Design of Hybrid Dynamic Balancer and Vibration Absorber." Shock and Vibration 2014 (2014): 1–18. http://dx.doi.org/10.1155/2014/397584.

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This study proposed a novel hybrid dynamic balancer and vibration absorber that is cheaper than active dampers and more effective than passive dampers. The proposed damping system does not need to be altered structurally to deal with different damping targets. Rather, the proposed vibration absorber is capable of self-adjustment to the optimal damping location in order to achieve balance and, thereby, optimize damping effects. The proposed device includes a groove under the damping target with inertial mass hung from a coil spring beneath. This allows the device to bounce vertically or rotate in order to reduce vibrations in the main body. The coil spring vibration absorber can also slide along the groove in order to adjust its location continuously until the vibrations in the system are minimized and the main body is balanced. Experiments verify the efficacy of the proposed device in improving damping performance beyond what has been achieved using conventional devices. We also provide an explanation of the theoretical underpinnings of the design as well as the implications of these findings with regard to future developments.

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Piccirillo, Vinícius, José M. Balthazar, Angelo Marcelo Tusset, Davide Bernardini, and Giuseppe Rega. "Application of a Shape Memory Absorber in Vibration Suppression." Applied Mechanics and Materials 849 (August 2016): 27–35. http://dx.doi.org/10.4028/www.scientific.net/amm.849.27.

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The dynamic response of structures subjected to high-amplitude vibration is often dangerous and undesirable. Dynamic vibration absorbers (DVA) have received special attention in recent years due to vibration attenuation offered by them. Thus, the present study analyzes the nonlinear dynamics of a system with a dynamic vibration absorber (DVA) using a shape memory material (SMM) whose characteristics are highly dependent upon temperature. The restoring force of the oscillator is provided by a shape-memory device (SMD) described by a thermomechanical model capable to describe the hysteretic behavior via the evolution of a suitable internal variable. Numerical simulations show the effectiveness of using the SMM in reducing oscillations of a harmonic oscillator.

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35

Aoki, Shigeru, and Takeshi Watanabe. "An Investigation of an Impact Vibration Absorber With Hysteresis Damping." Journal of Pressure Vessel Technology 128, no. 4 (February 16, 2006): 508–15. http://dx.doi.org/10.1115/1.2349557.

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The dynamic vibration absorber is a device for reducing the vibration of many structures and mechanical equipment. It consists of a small mass which is attached to the primary vibrating system or main mass. The impact damper is one of such dynamic vibration absorbers in which motion of auxiliary mass is limited by motion-limiting stop or placed inside a container. In this paper, in order to consider energy loss for an impact represented by the coefficient of restitution and duration of collision, an analytical model with hysteresis damping is introduced. Using this model, dynamic response of the system under harmonic and that under random excitations are analyzed. Some numerical results are shown.

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Shaw, Steven W., and Christophe Pierre. "The Dynamic Response of Tuned Impact Absorbers for Rotating Flexible Structures." Journal of Computational and Nonlinear Dynamics 1, no. 1 (May 18, 2005): 13–24. http://dx.doi.org/10.1115/1.1991872.

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This paper describes an analytical investigation of the dynamic response and performance of impact vibration absorbers fitted to flexible structures that are attached to a rotating hub. This work was motivated by experimental studies at NASA, which demonstrated the effectiveness of these types of absorbers for reducing resonant transverse vibrations in periodically excited rotating plates. Here we show how an idealized model can be used to describe the essential dynamics of these systems, and used to predict absorber performance. The absorbers use centrifugally induced restoring forces so that their nonimpacting dynamics are tuned to a given order of rotation, whereas their large amplitude dynamics involve impacts with the primary flexible system. The linearized, nonimpacting dynamics are first explored in detail, and it is shown that the response of the system has some rather unique features as the hub rotor speed is varied. A class of symmetric impacting motions is also analyzed and used to predict the effectiveness of the absorber when operating in its impacting mode. It is observed that two different types of grazing bifurcations take place as the rotor speed is varied through resonance, and their influence on absorber performance is described. The analytical results for the symmetric impacting motions are also used to generate curves that show how important absorber design parameters—including mass, coefficient of restitution, and tuning—affect the system response. These results provide a method for quickly evaluating and comparing proposed absorber designs.

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Zaman, Izzuddin, Bukhari Manshoor, and Amir Khalid. "Study of Vibration Absorbers Using Epoxy Reinforced Natural Fibers." Applied Mechanics and Materials 786 (August 2015): 174–78. http://dx.doi.org/10.4028/www.scientific.net/amm.786.174.

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It is well known fact that vibrations contribute to excessive wear, fatigue failure and other premature failure of machine components. Thus, various methods have been applied to control these vibrations. One of the commonly used is vibration absorber. The aim of this paper is to explore the potential of epoxy reinforced natural fibers as an alternative material for vibration absorber. Both mechanical properties and dynamic characteristic of the composites are investigated through tensile test and transmissibility test, respectively. Two types of natural fibers were selected for the study; coconut coir and pineapple leaf. The results show that the tensile modulus of composites increases with the increase of fiber content, although the strength was found decreases. This reduction indicates an ineffective stress transfer between the fiber and matrix. From the tensile test result, 20 vol% of pineapple leaf fiber was found to be the optimum fraction, in which afterward was employed for fabrication vibration absorber. Meanwhile, from the transmissibility test, it was noticed that when base excitation increases, the resonance peak and attenuation frequency were changed to the lower value. The fixed-fixed end beam with attached composite vibration absorbers showed that the resonance amplitude of the beam decreased significantly. More absorbers attached on the beam produce better result in attenuating the global structural vibration.

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Tsuji, Hideki, Hiroyuki Itoh, Shinji Mitsuta, Yasushi Ogasawara, Kenji Nishida, and Naoyuki Kanayama. "Vibration Reduction of Transfer Feeder by Dynamic Absorber. Dynamic Absorber Located on Vibration Transmission Path." Transactions of the Japan Society of Mechanical Engineers Series C 59, no. 566 (1993): 2986–90. http://dx.doi.org/10.1299/kikaic.59.2986.

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Liu, Haiping, and Dongmei Zhu. "Controlling the vibration and noise of a ballasted track using a dynamic vibration absorber with negative stiffness." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 234, no. 10 (November 17, 2019): 1265–74. http://dx.doi.org/10.1177/0954409719888084.

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In this study, a rail dynamic vibration absorber with negative stiffness is developed to reduce the vibration transmission and radiated noise from the rail components of a ballasted track. The compound models of the ballasted track system with and without the proposed dynamic vibration absorber and a traditional dynamic vibration absorber are constructed. A parametric study is performed to evaluate the effects of the design parameters of the proposed dynamic vibration absorber on the vibration and noise reduction of the track system in terms of the point receptance, the decay rate of rail vibration along the track, and the vibration energy level of the rail. Compared with the traditional dynamic vibration absorber, the proposed counterpart can work effectively over a broad frequency range around resonance. The efficiency of the dynamic vibration absorber can be improved by adjusting the design values of the active mass and damping coefficient. A comparison with the traditional dynamic vibration absorber shows that the vibration and noise suppression capability of the proposed one can be enhanced by increasing the value of the stiffness ratio. However, different from the traditional dynamic vibration absorber, the design parameters of the proposed one can also affect the decay rate and vibration energy at low-frequency regions. A discrete track with the proposed dynamic vibration absorber, which is arranged in continuous or discrete distribution along the rail, is illustrated to study the influences of the rail components on the decay rate and vibration energy level of rails. These calculated results could provide a theoretical basis for the design of the proposed dynamic vibration absorber in controlling the vibration and radiated noise from rails.

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Sun, Xiuting, and Youshuo Song. "Dynamical Performances of a Vibration Absorber for Continuous Structure considering Time-Delay Coupling." Shock and Vibration 2016 (2016): 1–15. http://dx.doi.org/10.1155/2016/5039796.

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The nonlinear effect incurred by time delay in vibration control is investigated in this study via a vibration absorber coupled with a continuous beam structure. The stability of the vibration absorber coupled structure system with time-delay coupling is firstly studied, which provides a general guideline for the potential time delay to be introduced to the system. Then it is shown that there is a specific region for the time delay which can bring bifurcation modes to the dynamic response of the coupling system, and the vibration energy at low frequencies can be transferred or absorbed due to the bifurcation mode and the vibration in the corresponding frequency range is thus suppressed. The nonlinear mechanism of this vibration suppression incurred by the coupling time delay is discussed in detail, which provides a novel and alternative approach to the analysis, design, and control of vibration absorbers in engineering practice.

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Ahmed, R. S., K. A. Atiyah, and I. A. Abdulsahib. "Control of vibration by using dynamic vibration absorber." IOP Conference Series: Materials Science and Engineering 881 (August 11, 2020): 012080. http://dx.doi.org/10.1088/1757-899x/881/1/012080.

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Liu, Lin, and Huang Cheng Fang. "Parametric Selection of Dynamic Vibration Absorbers for Resonant Suppression of Structure-Absorber Systems." Applied Mechanics and Materials 723 (January 2015): 31–35. http://dx.doi.org/10.4028/www.scientific.net/amm.723.31.

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The selection of absorber parameters is of utmost significance for structural vibration control by dynamic vibration absorbers. Based on the classical frequency tuning approach by Den Hartog, optimal damping ratio is derived in close form by equating the dynamic magnification factors of the structural motion at three particular frequencies of interest. In addition, by maximizing the two identical modal damping ratios through root locus in the first quadrant of complex plane, the corresponding absorber damping ratio is derived and proposed as the upper bound of the absorber damping ratio for practical applications.

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Drachev, Oleg, Igor Turbin, Irina Amirdzhanova, Tatyana Varentsova, and Veronika Petrova. "Dynamic vibration absorber for shaft machining." MATEC Web of Conferences 329 (2020): 03045. http://dx.doi.org/10.1051/matecconf/202032903045.

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The article is concerned with a new method that minimizes the vibration level of non-rigid axisymmetric parts on lathes. A schematic diagram of the vibration absorber control path is given. Its configuration is changing due to fictitious elastic stiffness parameters, as well as damping and the part–support subsystem weight. A functional dual circuit diagram of an automatic vibration level control system for non-rigid shafts machining is presented and its working principle is described

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44

Hidaka, Shoshi, Young Kong Ahn, and Shin Morishita. "Adaptive Vibration Control by a Variable-Damping Dynamic Absorber Using ER Fluid." Journal of Vibration and Acoustics 121, no. 3 (July 1, 1999): 373–78. http://dx.doi.org/10.1115/1.2893990.

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This paper describes a variable-damping dynamic absorber applying Electrorheological (ER) fluid to the damping element of a conventional-type dynamic absorber. A prototype of variable-damping dynamic absorber was constructed and its performance was verified with a three-story structural model. The special ability of the present dynamic absorber is to reduce the vibration amplitude at several frequencies by a single dynamic absorber. ER fluid is functional fluid whose yield shear stress can be changed by the applied electric field strength. Because of its peculiar property, ER fluid has been applied to various mechanical components such as shock absorbers and engine mounts for vehicles, clutches, valves, etc. One of the practical ways in applying ER fluid to mechanical components may be to expand the performance of conventional mechanical components by combining ER fluid effectively with them. In this sense, this paper shows a successful application of ER fluid to a conventional-type dynamic absorber. An adaptive neural network control system composed of a forward model network for system identification and a controller network was introduced to control the variable-damping element of the dynamic absorber. The numerical simulations show good agreements with the experimental results.

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45

Diveev, Bogdan. "Vibration impact and noise protection devices with DVA for wheeled vehicles." Transport technologies 2020, no. 2 (November 9, 2020): 65–75. http://dx.doi.org/10.23939/tt2020.02.065.

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The article investigates vibration and noise protection devices for wheeled vehicles using dynamic vibration absorbers (DVA). Algorithms for modeling their dynamic characteristics based on adaptive calculation schemes are presented. A non-linear suspension with DVA and a noise-absorbing partition is considered, which is due to the introduction of a layered composite thin-walled structure with an intermediate damping layer with high damping properties and a DVA system, which provides better vibration and noise absorption. The problems of shock propagation during the overturn of the bus to passengers are also considered. The influence of the parameters of the shock absorber on the dynamic properties of the bus is investigated. The optimal parameters of the shock absorber are determined.

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Barathwaaj, Dheepakram Laxmimala, Sujay Yegateela, Vivek Vardhan, Vignesh Suresh, and Devarajan Kaliyannan. "Effect of Inerter in Traditional and Variant Dynamic Vibration Absorbers for One Degree-of-Freedom Systems Subjected to Base Excitations." Mechanics and Mechanical Engineering 23, no. 1 (July 10, 2019): 9–16. http://dx.doi.org/10.2478/mme-2019-0002.

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Abstract In this paper, closed-form optimal parameters of inerter-based variant dynamic vibration absorber (variant IDVA) coupled to a primary system subjected to base excitation are derived based on classical fixed-points theory. The proposed variant IDVA is obtained by adding an inerter alone parallel to the absorber damper in the variant dynamic vibration absorber (variant DVA). A new set of optimum frequency and damping ratio of the absorber is derived, thereby resulting in lower maximum amplitude magnification factor than the inerter-based traditional dynamic vibration absorber (traditional IDVA). Under the optimum tuning condition of the absorbers, it is proved both analytically and numerically that the proposed variant IDVA provides a larger suppression of resonant vibration amplitude of the primary system subjected to base excitation. It is demonstrated that adding an inerter alone to the variant DVA provides 19% improvement in vibration suppression than traditional IDVA when the mass ratio is less than 0.2 and the effective frequency bandwidth of the proposed IDVA is wider than the traditional IDVA. The effect of inertance and mass ratio on the amplitude magnification factor of traditional and variant IDVA is also studied.

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NEMOTO, Kenya, Hiroshi YAMAMOTO, and Terumasa NARUKAWA. "Characteristics of adjustable dynamic vibration absorber." Transactions of the JSME (in Japanese) 84, no. 862 (2018): 18–00062. http://dx.doi.org/10.1299/transjsme.18-00062.

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NEMOTO, Kenya, Hiroshi YAMAMOTO, and Terumasa NARUKAWA. "Characteristics of adjustable dynamic vibration absorber." Proceedings of the Dynamics & Design Conference 2016 (2016): 232. http://dx.doi.org/10.1299/jsmedmc.2016.232.

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Tiseo, Barbara, Antonio Concilio, Antonio Gianvito, and Gary Koopmann. "An adaptive tunable dynamic vibration absorber." Journal of the Acoustical Society of America 122, no. 5 (2007): 3085. http://dx.doi.org/10.1121/1.2943022.

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Jiang, Shi Liang, Tie Jun Yang, Jing Tao Du, and Yin Yin Hu. "Research on Frequency-Tuned Dynamic Vibration Absorber." Applied Mechanics and Materials 66-68 (July 2011): 1762–68. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.1762.

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A frequency-tuned dynamic vibration absorber by tuning stiffness to reduce vibration at some troubled resonance frequencies of a simply supported beam structure is designed in this paper. Both theoretical and simulation analysis of vibration absorption are conducted. On the basis of analyzing bending vibration of the simply supported beam structure, inherent characteristics and frequency response characteristics of the simply supported beam system before and after being fixed dynamic vibration absorber are obtained by using the energy method with Rayleigh-Ritz procedure of flexible structure. Simulation model of the whole system, which is established by code written, is compared with the model established by finite element analysis software. Results are presented to show the efficiency of the vibration absorber, and then the effect of damping of the dynamic vibration absorber on vibration absorption is studied.

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Journal articles on the topic 'Dynamic Vibration Absorber'

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