Analysis of vibration characteristics of a simulated spinal vibration isolator

被引：0
|
作者：
Li X. [1 ,2 ]
Wang Z. [2 ]
Wang B. [2 ]
机构：
[1] State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun
[2] School of Mechanical Engineering and Automation, Northeastern University, Shenyang
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 08期
关键词：
Bionic structure; Harmonic balance method; Vibration isolator;
D O I：
10.13465/j.cnki.jvs.2022.08.028
中图分类号：
学科分类号：
摘要：
Inspired by the biological effect of human spine load-bearing and shock absorption, a bionic vibration isolator with multi-layer nodal connection was designed. The static model of the isolator was established. The influence of different design parameters on the static stiffness and bearing capacity of the isolator was analyzed. The system dynamic equation was established by the Lagrange dynamic formula, and the system was solved by the harmonic balance method. The influence of different structural parameters on the displacement transmissibility of the system was analyzed. The validity of the harmonic balance method was verified by comparing the numerical solution obtained by the fourth-order Runge-Kutta method with the analytical solution of the harmonic balance method. The results show that: the static stiffness of the isolator has obvious nonlinear characteristics. The positive stiffness, zero stiffness, or negative stiffness can be obtained in the working range by adjusting the design parameters; when the positive stiffness condition is satisfied, reducing the stiffness ratio and increasing the initial angle can improve the bearing capacity of the isolator. By adjusting the design parameters of the vibration isolator such as reducing the initial angle and reducing the stiffness ratio can significantly reduce the displacement transmissibility of the system. The results have guiding significance for the engineering application of the bionic spinal vibration isolator. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：231 / 237
页数：6
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