一种多层曲梁单元的准零刚度隔振器  

A quasi-zero stiffness vibration isolator for multilayer curved beam units

作　　者：肖望强 刘钧 戴宇 XIAO Wangqiang;LIU Jun;DAI Yu(School of Aerospace Engineering,Xiamen University,Xiamen 361102,China)

机构地区：[1]厦门大学航空航天学院,福建厦门361102

出　　处：《厦门大学学报(自然科学版)》2025年第2期297-306,共10页Journal of Xiamen University:Natural Science

基　　金：福建省科技计划项目(2022H6003)。

摘　　要：[目的]针对传统被动隔振器低频隔振性能不足的问题,提出了一种具有准零刚度(quasi-zero stiffness,QZS)特性的曲梁单元,并将其纵向并联构成一种新型QZS隔振器.[方法]首先,对该隔振器进行静力学分析,建立无量纲力-位移和无量纲刚度-位移关系式,并研究设计参数对隔振器刚度的影响,进一步得出隔振器在平衡位置处具有零刚度特性的参数条件;其次通过静力学仿真分析不同参数下的零刚度特性.最后,通过动态试验分析了隔振器的隔振效果.[结果]QZS隔振器隔振起始频率为10 Hz,隔振率达到88.78%,其既能兼顾主承载方向的性能又能在低频起良好的隔振性能.[结论]通过对曲梁单元QZS元件进行纵向并联构成一种新型QZS隔振器,保证大承载的情况下,仍具备低频隔振效果.[Objective]Addressing limitations of traditional passive isolators in terms of low-frequency vibration isolation performance,herein we propose a curved beam unit with quasi-zero stiffness(QZS)characteristics and incorporate it into a longitudinal parallel configuration to form a novel QZS isolator.[Methods]First,a static analysis of the isolator is conducted to establish dimensionless force-displacement and stiffness-displacement relationships.The influence of design parameters on the stiffness of the isolator is investigated,and parametric conditions for achieving zero stiffness at the equilibrium position are further derived.Second,static simulation is employed to analyze zero stiffness characteristics under various parameters.Finally,dynamic experiments are performed to analyze the vibration isolation effectiveness of the isolator.[Results]The QZS isolator exhibits a starting isolation frequency of 10 Hz and achieves an isolation rate of 88.78%.Furthermore,it can take into account both the performance in the main load direction and the good vibration isolation performance at low frequencies.[Conclusions]A new type of quasi-zero stiffness vibration isolator is established by longitudinally connecting QZS elements of curved beam units in parallel,thus ensuring the low frequency vibration isolation effect even under the condition of large load bearing.

关 键 词：低频隔振 QZS隔振器 曲梁屈曲理论 多层曲梁单元 

分 类 号：TU112.596[建筑科学—建筑理论]