Investigation on Self-adaptive Vibration Suppression for Cantilever Euler Beam with Interior Inlaid Fluid under Principal Resonant Excitation

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Journal of Vibration and Shock ›› 2011, Vol. 30 ›› Issue (8) : 41-44.

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Investigation on Self-adaptive Vibration Suppression for Cantilever Euler Beam with Interior Inlaid Fluid under Principal Resonant Excitation

Wang Jian-wei1; Xu Hui2; Ma Ning2

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Abstract

Combining experiments carried out in the workbench for the beam & plate with interior inlaid freely moving mass, the self-adaptive vibration suppression is simulated for a cantilever Euler beam with interior inlaid fluid under the first and second principal resonant excitations. A hydrokinetic model with dynamic boundaries is established by simplifying the original liquid-solid model. The simulations agree with the experiments, fully revealing the three kinds of movements for the inlaid fluid. Fluid pressures acting on the walls are analyzed, and relations between the pressures and fluid movements are also established. Compared with the vibration displacements of the beam, the pressures varying with time express a significant delay characteristic in the time domain. From the energy dissipation, a quantitative criterion is proposed to evaluate the damping effect due to the fluid movements for the simplified model.

Key words

Euler beam with interior inlaid fluid / hydrokinetic model with dynamic boundaries / self-adaptive vibration suppression / delay characteristic / quantitative criterion

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Wang Jian-wei;Xu Hui;Ma Ning. Investigation on Self-adaptive Vibration Suppression for Cantilever Euler Beam with Interior Inlaid Fluid under Principal Resonant Excitation[J]. Journal of Vibration and Shock, 2011, 30(8): 41-44