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, a flexibly-mounted active vibration absorber (AVA) with a secondary controllable mass M3 is described, where the passive resonance of mass M2 of the tuned absorber is insufficient to control the input vibration, a secondary mass M 3 is vibrated at a frequency, amplitude and phase sufficient to make up the deficiency in mass M 2.
Abstract: A flexibly-mounted active vibration absorber (AVA) which has a secondary controllable mass M3. If the passive resonance of mass M2 of the tuned absorber is insufficient to control the input vibration, a secondary mass M3 is vibrated at a frequency, amplitude and phase sufficient to make up the deficiency in mass M2. Many embodiments are described which depict variations on the first spring used for flexibly mounting the AVA, the actuators used to drive the AVA, and the attachment features for attaching to a vibrating member. Further, in another aspect, means for counterbalancing the moments produced by the AVA are described.
63 citations
TL;DR: In this article, the authors considered the application of a state-switchable dynamical system for vibration control on beams subjected to harmonic point-force excitation, where a switchable stiffness element is incorporated as part of the spring element of a vibration absorber, and the change in stiffness causes a change in the resonance frequencies of the system, thereby instantaneously'retuning' the state-switched absorber to a new frequency.
Abstract: A system that has the capability to make instantaneous changes in its mass, stiffness, or damping may be termed a state-switchable dynamical system. Such a system will display different dynamical responses dependent upon its current state. State-switchable stiffness may be practically obtained through the control of the termination impedance of piezoelectric stiffness elements. If such a switchable stiffness element is incorporated as part of the spring element of a vibration absorber, the change in stiffness causes a change in the resonance frequencies of the system, thereby instantaneously 'retuning' the state-switched absorber to a new frequency. In between state switches, the operation of such a device is passive, being fundamentally a passive vibration absorber. This concept has improved performance over classical passive vibration absorbers or dampers, particularly for disturbances with multiple spectral components. This paper considers the application of such a device for the purpose of vibration control on beams subjected to harmonic point-force excitation.
62 citations
TL;DR: In this article, the response of a linear SDOF system subjected to harmonic excitation to which a Tuned Vibration Absorber with linear stiffness and dry friction damping is attached is considered.
Abstract: The response of a linear SDOF system subjected to harmonic excitation to which a Tuned Vibration Absorber with linear stiffness and dry friction damping is attached is considered. Based on an intuitive examination of the physical behaviour of the system, closed-form expressions for TMD optimum parameters and for the steady-state amplitudes of vibration are presented. Two examples allow the comparison between the predicted behaviour and that found by numerically integrating the equations of motion.
62 citations
TL;DR: In this article, the performance of non-linear shock isolators with Coulomb damper, three-element isolator, four-stage isolator and two-stage isolateator were compared.
62 citations
TL;DR: In this article, a so-called ABH-featured Resonant Beam Damper (ABH-RBD) is proposed for the broadband vibration suppressions of a primary structure.
61 citations