基于凸轮-滚子结构的多自由度准零刚度系统设计  

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

作　　者：田海洋 张万福[1] 薛聪聪 顾乾磊 张世东 李春[1] TIAN Haiyang;ZHANG Wanfu;XUE Congcong;GU Qianlei;ZHANG Shidong;LI Chun(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;School of Energy and Environment,Southeast University,Nanjing 210096,China;Shanghai Minghua system’s Electric Power Science&Technology Co.,Ltd.,Shanghai 200090,China)

机构地区：[1]上海理工大学能源与动力工程学院,上海200093 [2]东南大学能源与环境学院,南京210096 [3]上海明华电力科技有限公司,上海200090

出　　处：《振动与冲击》2024年第13期172-179,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51875361);上海市自然科学基金(20ZR1439200)。

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,试验结果表明,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6.7 Hz降低至3.5 Hz,隔振效率最大提升约84.3%;水平方向上起始隔振频率从6.0 Hz降低至4.0 Hz,隔振效率最大提升约45.0%;在10.0 Hz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。Here,a multi-DOF nonlinear quasi-zero stiffness low-frequency vibration isolation device was designed based on cam-roller structure.By calculating static characteristics and combining with the theory of lateral stiffness calculation,parametric conditions for realizing quasi-zero stiffness of the system on multi-DOF were obtained.The harmonic balance method was used to analyze the system’s dynamic characteristics,obtain the system’s force transmission rate,and analyze effects of pre-load,damping ratio and excitation force on the system vibration transmission rate.To verify the vibration isolation performance of the quasi-zero stiffness system,a vibration isolation testing system was built.The experimental results showed that compared to traditional linear vibration isolation system,multi-DOF vibration isolation system’s initial vibration isolation frequency in vertical direction decreases from 6.7 Hz to 3.5 Hz,and the vibration isolation efficiency improves by up to 84.3%;the initial vibration isolation frequency in horizontal direction decreases from 6.0 Hz to 4.0 Hz,and the vibration isolation efficiency improves by up to 45.0%;below 10.0 Hz,the vibration transmission rate of multi-DOF vibration isolation system is much lower than that of linear vibration isolation system.

关 键 词：准零刚度 横向刚度 低频隔振 多自由度 

分 类 号：TH1[机械工程]