具有非线性能量阱的双层隔振系统抗冲击分析  

Anti-shock Analysis of Two-stage Vibration Isolation Systems with Nonlinear Energy Sink

作　　者：陈森 朱翔[1,2,3] 李天匀[1,2,3] 陈树鑫[1,2] CHEN Sen;ZHU Xiang;LI Tianyun;CHEN Shuxin(School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Key Laboratory of Naval Architecture and Ocean Engineering Hydrodynamics,Huazhong University of Science and Technology,Wuhan 430074,China;Collaborative Innovation Center for Advanced Ship and Deep-sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]华中科技大学船舶与海洋工程学院,湖北武汉430074 [2]华中科技大学船舶和海洋水动力湖北省重点实验室,湖北武汉430074 [3]上海交通大学高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《数字海洋与水下攻防》2023年第3期332-337,共6页Digital Ocean & Underwater Warfare

基　　金：国家自然科学基金资助项目“内部含液舱的水下圆柱壳结构耦合振动与声辐射特性研究”(51879113)。

摘　　要：近年来,非线性能量阱(NES)以其宽频减振、鲁棒性好等优点被广泛应用于隔振抗冲领域。针对船舶隔振装置受到冲击载荷作用,建立了具有非线性能量阱的双层隔振系统动力学模型。利用三折线冲击谱来模拟基座受到的冲击波,并通过Runge-Kutta法计算系统的瞬态响应。通过能量分析法讨论了非线性刚度、阻尼系数、附加质量对设备的抗冲击效果的影响。计算结果表明:非线性能量阱性能良好,在最优参数范围内,可显著降低设备的冲击能量,控制残余振动。In recent years,nonlinear energy sink(NES)has been widely used in vibration isolation and anti-impact field with its advantages of wide frequency damping and good robustness.In this paper,a dynamic model of two-stage vibration isolation system with nonlinear energy sink is established for the ship vibration isolation device subjected to impact load.The impact spectrum is used to simulate the shock wave to the base and the transient response of the system is calculated by Runge-Kutta method.The effects of nonlinear stiffness,damping coefficient,and additional mass on the impact resistance of the device are discussed by energy analysis.The calculation results show that the nonlinear energy sink performs well and can significantly reduce the impact energy of the equipment and control the residual vibration in the optimal parameter range.

关 键 词：双层隔振系统 非线性能量阱 抗冲击 

分 类 号：O328[理学—一般力学与力学基础]