Dynamic characteristics of an inclined inerter-based vibration isolator with geometric nonlinearity

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (21) : 184-189.

WANG Yong1, WANG Ruochen1, MENG Haodong2

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Abstract

Here, an inclined inerter-based vibration isolator with geometric nonlinearity was proposed.It was shown that the force of the inerter in moving direction of its bearing mass is nonlinear and the acceleration term in the system’s dynamic equation is also nonlinear.The system’s dynamic response was obtained using the harmonic balance method and then compared with the numerical solution.The vibration isolation performance of the inclined inerter-based vibration isolator was evaluated with peak dynamic displacement, peak transmissibility and vibration isolation frequency band.It was compared with the vibration isolation performance of an equivalent linear vibration isolator.The results showed that when the excitation force amplitude is smaller, compared with the linear vibration isolator, the inclined inerter-based vibration isolator has a smaller force peak transmissibility, a wider vibration isolation frequency band, and a larger peak dynamic displacement.

Key words

inerter / vibration isolator / geometrical nonlinearity / dynamic characteristic

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WANG Yong1, WANG Ruochen1, MENG Haodong2. Dynamic characteristics of an inclined inerter-based vibration isolator with geometric nonlinearity[J]. Journal of Vibration and Shock, 2018, 37(21): 184-189

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