一种双连杆-弹簧-曲面机构的QZS隔振器设计和研究

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Abstract Based on the parallel connection principle of positive and negative stiffnesses, taking double link-spring-curved surface mechanism as negative stiffness mechanism and a vertical spring as positive stiffness mechanism, a new configuration of quasi-zero stiffness (QZS) vibration isolator was proposed.According to the above configuration, through static analysis, the displacement-stiffness characteristics and displacement-restoring force characteristics of QZS system were studied to obtain QZS condition under the system’s static equilibrium.Nonlinear dynamic equations of QZS system were established and solved with the harmonic balance method and Runge-Kutta method.Aiming at different excitation amplitudes, damping coefficients and QZS parameters, dynamic response and transmissibility characteristics of the system were studied.The theoretical study showed that the proposed QZS configuration can effectively reduce the system model’s resonance frequency and the maximum transmissivity amplitude.Finally, based on the 3-D model of QZS isolator, numerical simulation and test study showed that the proposed QZS configuration has better low-frequency vibration isolation performance, and has the same high-frequency vibration isolation performance as linear system.

Key words： double link-spring-curved surface mechanism quasi-zero stiffness (QZS) harmonic balance method Runge-Kutta method transmissibility

Received: 25 August 2020 Published: 15 June 2021

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	WANG Zhicheng
	WANG Shenlong
	YU Huijie

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WANG Zhicheng,WANG Shenlong,YU Huijie. Design and research of QZS vibration isolator with double link-spring-curved surface mechanism[J]. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(11): 220-229.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2021/V40/I11/220

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