折纸型准零刚度系统的隔振性能研究  

VIBRATION ISOLATION PERFORMANCE OF ORIGAMI INSPIRED QUASI-ZERO-STIFFNESS SYSTEM

作　　者：周雅[1] 蒙格尔 叶震[1] 叶霄鹏 张家豪 冯健[1] 蔡建国[1,3] ZHOU Ya;MENG Ge-er;YE Zhen;YE Xiao-peng;ZHANG Jia-hao;FENG Jian;CAI Jian-guo(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,National Prestress Engineering Research Center,Southeast University,Nanjing 211189,China;Zhuhai CRCC Building Estate Co.,Ltd,Zhuhai 519030,China;Shenzhen Research Institute,Southeast University,Shenzhen 518063,China)

机构地区：[1]东南大学国家预应力工程技术研究中心,混凝土及预应力混凝土结构教育部重点实验室,南京211189 [2]珠海铁建大厦置业有限公司,珠海519030 [3]东南大学深圳研究院,深圳518063

出　　处：《工程力学》2024年第6期246-256,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(51822805,51878147,U1937202);深圳市中央引导地方科技专项资金资助项目(2021Szvup027);中国铁建投资集团有限公司2020年度科技研发计划课题项目(2020-A02)。

摘　　要：准零刚度隔振系统因具备高静态低动态的刚度特性得到广泛研究,但是较短的准零刚度行程限制了其在低频隔振领域的应用推广。基于非线性正刚度和非线性负刚度并联的理念,由Kresling折纸构型启发设计一种新型的准零刚度隔振系统,采用有限元分析准零刚度隔振系统的可行性。建立了折纸型准零刚度系统的力学模型,研究了在正常工况下阻尼比、荷载幅值和回复力模型高阶项对幅频特性和力传递特性的影响,并扩展到过载工况下折纸型准零刚度系统隔振性能研究。开展折纸型准零刚度系统隔振试验并与有限元结果进行对比分析。分析结果表明,隔振系统随着阻尼增大和激振力幅值减小,响应幅值和传递率均会减小。具备高阶项的回复力模型使折纸型准零刚度系统在正常和过载工况下具有更低的起始隔振频率、共振频率以及振动传递率。试验验证折纸型准零刚度系统具备较为良好的隔振性能。The quasi-zero stiffness isolation system has been widely studied because of its high static and low dynamic stiffness characteristics.However,the short quasi-zero stiffness range limits its application in the field of low-frequency vibration isolation.A new quasi-zero stiffness isolation system was designed based on the concept of parallel connection of nonlinear positive stiffness and negative stiffness,inspired by the Kresling origami pattern.The feasibility of the quasi-zero stiffness isolation system was analyzed and verified by the finite element method.The mechanical model of the origami-inspired quasi-zero stiffness system was established.The effects of the damping ratio,load amplitude and higher-order terms of the recovery force model on the amplitude-frequency characteristics and force transmissibility were studied under normal operating conditions.The vibration isolation performance analysis was also extended to overload operating conditions.The vibration isolation test of the quasi-zero stiffness system was carried out and compared with the finite element results.The analysis results show that the response amplitude and transmission rate of the vibration isolation system decrease as the damping ratio increases and the amplitude of the excitation force decreases.The recovery force model with higher-order terms enables the origami-inspired quasi-zero stiffness system to have a lower starting vibration isolation frequency,resonance frequency and vibration transmission rate under normal and overload conditions.The test results show that the origami-inspired quasi-zero stiffness system has good vibration isolation performance.

关 键 词：折纸 准零刚度 隔振 回复力模型 过载 

分 类 号：O322[理学—一般力学与力学基础]