基于双稳定层合板的准零刚度隔振系统  

A quasi-zero stiffness vibration isolation system based on bi-stable laminate

作　　者：邓泽华 李昊[1] 周徐斌[1] DENG Zehua;LI Hao;ZHOU Xubin(Shanghai Institute of Satellite Engineering,Shanghai 200240,China)

机构地区：[1]上海卫星工程研究所,上海200240

出　　处：《振动与冲击》2020年第21期116-125,共10页Journal of Vibration and Shock

基　　金：国家自然科学基金青年基金(51605299)。

摘　　要：根据并联负刚度机构来降低系统总体刚度的原理,利用双稳定复合材料层合板自身的负刚度特性与线性弹簧串联组成新的负刚度机构,提出了一种具有静刚度可调节性的准零刚度(QZS)隔振系统。对提出的准零刚度隔振系统的力学原理进行了说明,利用Hamilton原理推导了系统的静力学与动力学理论模型。采用理论和有限元方法分析了隔振系统的刚度特性,结果显示提出的隔振系统在保证准零刚度特性的基础上,能够通过串、并联线性弹簧的刚度匹配实现不同的静刚度特性。对制备出的原理样机进行了刚度特性和隔振性能验证实验。刚度实验测得的力-位移曲线与仿真结果吻合良好。隔振实验表明,设计出的准零刚度隔振系统能够有效拓宽具有相同正刚度的线性隔振系统的隔振频带。基于实验结果,结合理论模型对隔振性能的影响因素进行了分析和讨论。Here, according to the principle to decrease the overall stiffness of a system with a parallel negative stiffness mechanism, using negative stiffness feature of a bi-stable laminate and linear spring in series to form a new negative stiffness mechanism, a novel bi-stable laminate-based quasi-zero stiffness(QZS) vibration isolation system with tunable static stiffness was proposed. The mechanical principle of the proposed system was illustrated. Hamilton principle was used to derive the dynamic and static models of the system. The stiffness characteristics of the system were analyzed with theoretical and finite element methods. Results showed that the proposed vibration isolation system can realize different static stiffness characteristics and keep the QZS feature by matching stiffness of series and parallel linear springs. The verification tests of stiffness characteristics and vibration isolation performance were conducted for the manufactured principle prototypes.It was shown that the measured force-displacement curves agree well with the simulation results;the proposed quasi-zero stiffness vibration isolation system can effectively broaden the vibration isolation frequency band of a linear vibration isolation system with the same positive stiffness. Based on the test results, combining with the theoretical model, influence factors on vibration isolation performance were analyzed and discussed.

关 键 词：负刚度 准零刚度(QZS) 隔振系统 双稳定层合板 

分 类 号：O328[理学—一般力学与力学基础]