Topic
Dynamic Vibration Absorber
About: Dynamic Vibration Absorber is a research topic. Over the lifetime, 4764 publications have been published within this topic receiving 49429 citations.
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TL;DR: In this article, the authors proposed a multi-dynamic absorber and its optimum design method, which is effective in controlling the vibration of the controlled object under changes of these parameters and maintaining stable damping performance.
Abstract: In order to improve the robustness of conventional dynamic absorbers, we propose the multi dynamic absorber and its optimum design method. Although the design method for single and dual types of dynamic absorbers has already been established, their vibration control effects are very sensitive to changes of parameters such as the natural frequency of the controlled object and the damping coefficient of the absorber itself. The quadruple and sextuple types of dynamic absorbers designed by the proposed method are demonstrated. They are effective in controlling the vibration of the controlled object under changes of these parameters and maintain stable damping performance.
13 citations
TL;DR: In this paper, the authors propose a methodology to identify a single degree-of-freedom nonlinear system with cubic stiffness and a methodology for the optimum design of a viscoelastic dynamic absorber with linear behavior, intending to reduce the vibrations of the cubic system to as low a level as possible.
13 citations
TL;DR: A novel method for research on exposure to nonlinear vibration of passenger car suspension as nonlinear dynamical system is presented and results of analysis of application of one of the time-frequency representation techniques to the identification of structure of vibration are addressed.
Abstract: The paper presents novel method for research on exposure to nonlinear vibration of passenger car suspension as nonlinear dynamical system. Also paper provides a discussion on the results of studies addressing the impact exerted by damping properties of shock absorber on the vibrations being generated. The research was conducted on the car forced to vibration by the exciter machine with changeable frequency. The paper addresses results of analysis of application of one of the time-frequency representation techniques to the identification of structure of vibration. The obtained representation of the vibration allows determining time function of separate frequency bands, which represents the isolated vibration dynamics phenomena. Considering the variability of the time and frequency distribution of the vibration even in selected analysed bands, the time function was developed as exposure to vibration estimator. The recommended method makes use of function of exposure to vibration. The advantage of these method is possibilities of precise analysis of chosen frequency bands. The investigations conducted confirm considerable susceptibility to changes in the technical condition of shock absorber with regard to the assessment of human exposure to vibrations.
13 citations
TL;DR: Liapunov's second method is applied to minimize an integrated square performance measure for damped vibrating structures subjected to initial excitation as discussed by the authors, which reduces the calculation of the performance measure and its derivatives with respect to design parameters to the solution of a set of linear algebraic equations.
13 citations
TL;DR: In this paper, an optimal design of damped dynamic vibration absorber using minimax method for a primary system with Coulomb friction and viscous damping is presented, and a set of constraint equations that include the distribution characteristic of the resonant frequencies of the primary system is established for the optimal design.
Abstract: In this paper, an optimal design of damped dynamic vibration absorber using minimax method for a primary system with Coulomb friction and viscous damping is presented. Meanwhile, to reduce sensitivity of the primary system response to the variations of the forcing frequency, a set of constraint equations that include the distribution characteristic of the resonant frequencies of the primary system is established for the optimal design. Effectiveness of the proposed design is illustrated through numerical simulations. The formulations and results in this paper extend previous results given by Den Hartog and Pennestri.
13 citations