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 effect of the DVAs on the vibration absorption of the FST subjected to vehicle dynamic loads is evaluated with the help of the insertion loss in one-third octave frequency bands.
Abstract: This study aims to effectively and robustly suppress the low-frequency vibrations of floating slab tracks (FSTs) using dynamic vibration absorbers (DVAs). First, the optimal locations where the DVAs are attached are determined by modal analysis with a finite element model of the FST. Further, by identifying the equivalent mass of the concerned modes, the optimal stiffness and damping coefficient of each DVA are obtained to minimise the resonant vibration amplitudes based on fixed-point theory. Finally, a three-dimensional coupled dynamic model of a metro vehicle and the FST with the DVAs is developed based on the nonlinear Hertzian contact theory and the modified Kalker linear creep theory. The track irregularities are included and generated by means of a time–frequency transformation technique. The effect of the DVAs on the vibration absorption of the FST subjected to the vehicle dynamic loads is evaluated with the help of the insertion loss in one-third octave frequency bands. The sensitivities of the m...
53 citations
TL;DR: The tuned mass damper is one of the most popular structural vibration suppression techniques as mentioned in this paper. But its performance has not yet reached the state-of-the-art of the art.
Abstract: To date, considerable attention has been paid to the development of structural vibration suppression techniques. Among all vibration suppression devices and techniques, the tuned mass damper is one...
53 citations
TL;DR: In this paper, two numerical approaches are employed to find the optimum design of the damped dynamic vibration absorber (DVA) for damped primary systems, where the DVA damper is connected between the absorber mass and the ground.
Abstract: This study focuses on the optimum design of the damped dynamic vibration absorber (DVA) for damped primary systems. Different from the conventional way, the DVA damper is connected between the absorber mass and the ground. Two numerical approaches are employed. The first approach solves a set of nonlinear equations established by the Chebyshev’s equioscillation theorem. The second approach minimizes a compound objective subject to a set of the constraints. First the two methods are applied to classical systems and the results are compared with those from the analytical solutions. Then the modified Chebyshev’s equioscillation theorem method is applied to find the optimum damped DVAs for the damped primary system. Various results are obtained and analyzed.
53 citations
53 citations
TL;DR: In this paper, the optimum tuning frequency and damping ratio of a vibration absorber, for which the steady state response of the damped primary system excited by an external force is minimized, were determined by a numerical search procedure.
52 citations