准零刚度柔性隔振超结构设计与仿真分析  

Design and simulation analysis of a quasi-zero stiffness flexible vibration isolation metastructure

作　　者：周佳豪 潘洪斌 蔡昌琦 王凯[1] 周加喜[1] ZHOU Jiahao;PAN Hongbin;CAI Changqi;WANG Kai;ZHOU Jiaxi(College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082

出　　处：《哈尔滨工程大学学报》2022年第9期1258-1264,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金项目(12122206,11972152,12002122)。

摘　　要：针对如何有效抑制低频微振动问题,本文提出了一种可多层叠加的准零刚度柔性隔振超结构。基于柔性机构理论,利用形状优化方法设计了单层准零刚度柔性结构。基于大变形理论结合打靶法,分析了柔性结构的静力学特性,并利用有限元仿真进行了验证。将单层隔振结构进行堆叠,构造了多层准零刚度柔性隔振系统,建立了其有限元模型和多自由度简化模型,研究了其隔振特性,并讨论了阻尼和层数对隔振性能的影响。结果表明:在有效隔振频率区间,随着层数增加,起始隔振频率向低频移动,隔振效果得到明显提升。To effectively suppress the low-frequency micro-vibration, a multilayer quasi-zero stiffness flexible vibration isolation metastructure is proposed in this paper. First, a single-layer quasi-zero stiffness flexible structure is designed based on the compliant mechanism theory by using the shape optimization method. Second, based on the large deformation theory combined with the shooting method, the static characteristics of the flexible structure are analyzed and later verified by the finite element simulation. Finally, the single-layer vibration isolation structures are stacked to construct a multilayer quasi-zero stiffness flexible vibration isolation system, whose finite element model and multi-degree-of-freedom simplified model are established, and their vibration isolation characteristics are studied. Moreover, the effects of the damping ratio and the number of layers on the vibration isolation performance are discussed. The results indicate that in the frequency range of effective vibration isolation, with the increasing number of layers, the initial vibration isolation frequency shifts toward a low frequency, and the vibration isolation effect is markedly improved.

关 键 词：准零刚度 超结构 多层隔振 低频 微振动 柔性结构 一体化设计 形状优化 

分 类 号：O328[理学—一般力学与力学基础]