准零刚度隔振平台的冲击响应及能量分析
Shock Response and Energy Analysis of Quasi-zero Stiffness Vibration Isolation Platform
刘彦琦 1顾黄森 2宋春芳 2汪新 2邓二杰 2王友会2
作者信息
- 1. 北京市科学技术研究院 城市安全与环境科学研究所,北京 100054
- 2. 江南大学 机械工程学院 江苏省食品先进制造装备技术重点实验室,江苏无锡 214122
- 折叠
摘要
本文对准零刚度(Quasi-zero stiffness,QZS)隔振平台进行了冲击响应及能量分析,详细分析了系统的时域冲击响应以及系统能量损耗特性.首先建立了冲击激励下系统的非线性动力学方程,数值分析了QZS隔振平台系统的时域冲击响应,并与相应的线性系统进行对比分析.之后以系统能量损耗速度作为系统缓冲性能的评价指标,分析了阻尼及结构参数对系统缓冲性能的影响.研究表明:QZS系统的位移响应幅值高于相应的线性系统,但QZS隔振系统位移响应的衰减速度快于线性系统,衰减所需的周期数少于线性系统.另外,阻尼有助于提高系统的缓冲效果,刚度比和倾斜角并不会对系统缓冲性能造成较大影响.
Abstract
Shock response and energy analysis of quasi-zero stiffness(QZS)vibration isolation platform is carried out.To focus on the shock performance and energy loss characteristics,the six-degree freedom nonlinear dynamic equations of the QZS system under impact excitation are deduced firstly.The shock response of system is numerically analyzed and compared with that of the corresponding linear isolation system.Subsequently,the influences of damping and structural parameters on the buffering performance are analyzed by using the energy loss velocity as the evaluation index of the buffering performance.The results indicate that the response amplitude of system is higher than that of the corresponding linear system,but the response of the QZS system declines faster than that of the corresponding linear system,and the number of periods required for attenuation is less than that of the linear system.Therefore,the damping can improve the buffering performance,and the stiffness ratio and inclination angle have few impacts on the buffering performance of the QZS vibration isolation platform.
关键词
准零刚度/隔振系统/冲击响应/能量损耗Key words
quasi-zero stiffness/vibration isolation system/shock response/energy loss引用本文复制引用
基金项目
北京市自然科学基金项目(1182010)
北京市西城区优秀人才培养拔尖团队项目()
轨道交通基础设施性能监测与保障国家重点实验室开放课题(HJGZ2021101)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据