基于凸轮-滚子结构的多自由度准零刚度系统设计

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振动与冲击 ›› 2024, Vol. 43 ›› Issue (13) : 172-179.

论文

田海洋1，张万福1，薛聪聪1，顾乾磊2，张世东3，李春1

作者信息 +

Design of multi-DOF quasi-zero stiffness low frequency vibration isolation system based on cam-roller structure

TIAN Haiyang1, ZHANG Wanfu1, XUE Congcong1, GU Qianlei2, ZHANG Shidong3, LI Chun1

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文章历史 +

摘要

基于凸轮-滚子结构设计一种多自由度非线性准零刚度低频隔振装置。通过静力学特性计算，结合横向刚度计算理论，得到系统在多个自由度上实现准零刚度的参数条件。利用谐波平衡法分析了系统动力学特性，得出系统力传递率，并分析了预压、阻尼比及激励力对系统振动传递率的影响。为验证准零刚度系统隔振性能，搭建隔振测试系统，实验结果表明，相较于传统线性隔振系统，多自由度隔振系统在竖直方向上起始隔振频率从6.7Hz降低至3.5Hz，隔振效率最大提升约84.3%；水平方向上起始隔振频率从6Hz降低至4Hz，隔振效率最大提升约45%；在10Hz以下，多自由度隔振系统的振动传递率远小于线性隔振系统。

Abstract

A multi-degree-of-freedom nonlinear quasi-zero-stiffness low-frequency vibration isolation device based on cam-roller structure is designed. Through the calculation of static characteristics and the calculation theory of lateral stiffness, the parameter conditions for realizing quasi-zero stiffness in multiple degrees of freedom are obtained. The dynamic characteristics of the system are analyzed by harmonic balance method, and the effects of preload, damping ratio and excitation force on the system are obtained. In order to verify the vibration isolation performance of the quasi-zero-stiffness system, a vibration isolation test system was built. The experimental results show that compared with the traditional linear vibration isolation system, the initial vibration isolation frequency of the multi-degree-of-freedom vibration isolation system in the vertical direction is reduced from 6.7Hz to 3.5Hz, and the vibration isolation efficiency is increased by about 84.3% at the maximum. In the horizontal direction, the initial vibration isolation frequency is reduced from 6Hz to 4Hz, and the maximum vibration isolation efficiency is increased by about 45%.Below 10Hz, the vibration transmission of multi-degree-of-freedom vibration isolation system is much smaller than that of linear vibration isolation system.

导出引用

田海洋1，张万福1，薛聪聪1，顾乾磊2，张世东3，李春1. 基于凸轮-滚子结构的多自由度准零刚度系统设计[J]. 振动与冲击, 2024, 43(13): 172-179

TIAN Haiyang1, ZHANG Wanfu1, XUE Congcong1, GU Qianlei2, ZHANG Shidong3, LI Chun1. Design of multi-DOF quasi-zero stiffness low frequency vibration isolation system based on cam-roller structure[J]. Journal of Vibration and Shock, 2024, 43(13): 172-179

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