低频大幅隔振器设计及实验  

Design and Experiment of a Vibration Isolator for Low Frequency and Large Amplitude Excitation

作　　者：孙秀婷[1,2] 孙英超 钱佳伟 徐鉴 Sun Xiuting;Sun Yingchao;Qian Jiawei;Xu Jian(School of Aerospace Engineering and Applied Mechanics,Tongji University,Shanghai 200092,China;Key Laboratory of AI-aided Airworthiness of Civil Aircraft Structures,Civil Aviation Administration,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学航空航天与力学学院,上海200092 [2]同济大学民航航空器结构智能辅助适航重点实验室,上海200092

出　　处：《动力学与控制学报》2024年第2期59-67,共9页Journal of Dynamics and Control

基　　金：国家自然科学基金资助项目(11932015,12122208,12372002,12372043);中央高校基本科研业务费专项资金。

摘　　要：为了突破传统隔振器刚度和承载能力之间的矛盾,需要隔振器具有高的静态刚度,低动态刚度的特性.如今的准零刚度隔振器技术可以实现低频微幅隔振,但是对于大幅振动,隔振效果并不明显甚至失效,因此突破宽幅隔振成为隔振领域亟待解决的问题.为此,我们利用多稳态折纸通过并联装配的方式,构造具有宽幅零刚度区间的折纸型隔振器,以解决传统隔振器振动抑制幅值较低的问题.本文建立了宽零刚度隔振器模型,提出宽幅零刚度的设计方法,并通过动力学分析分析了模型的隔振效果.最后搭建试验样机,验证了理论的正确性.这种设计打破了传统准零刚度隔振器单点准零的设计准则,能够在一个大幅范围内保证稳定性,同时实现零刚度,极大拓宽了隔振器的适用范围.这种设计理念能够被用在新隔振材料设计和航空、船舶等大幅低频动态环境中.Vibration isolators with high-static-low-dynamic-stiffness(HSLDS)characteristics are required in order to break through the contradiction between the stiffness and the load bearing capacity of the traditional vibration isolator.Nowadays,quasi-zero-stiffness vibration isolator technology can realize low-frequency vibration isolation under a small amplitude,but for large amplitude vibration,the vibration isolation effect is weakened or even ineffective.Therefore,wide-range amplitude vibration isolation has become a problem to be solved in the field of vibration isolation.In order to solve the problem of small vibration suppression amplitude of traditional vibration isolators,a parallel-assembly origami vibration isolator with wide zero stiffness range is proposed.The dynamic model of the origami vibration isolator with wide zero stiffness range is established,and design methodology for wide zero stiffness range is proposed.Based on the dynamic model,the vibration isolation effectiveness is analyzed.Finally,the correctness of the dynamic analysis is verified experimentally.This new design breaks through the design criterion of the traditional quasi-zero stiffness isolator that zero stiffness is only achieved at a specific point.Stability can be guaranteed over a large range,while achieving zero stiffness,which greatly broadens the application range of vibration isolators.This design concept can be used in the design of new vibration isolation materials and in large low-frequency dynamic environments such as aerospace and ships.

关 键 词：宽范围零刚度 高静低动系统 非线性隔振 低频激励 

分 类 号：O328[理学—一般力学与力学基础]