摘要
研究并联纯立方刚度和并联非光滑非线性能量阱(Nonlinear Energy Sink,NES)的最优参数变化规律并对两者的吸振效能进行对比分析。利用哈密顿原理分别推导出连接并联纯立方刚度NES和并联非光滑NES的系统的动力学方程,使用粒子群算法得出两种NES的最优吸振效能和最优参数,并对其进行对比分析。研究结果显示,优化前纯立方刚度NES在中等载荷作用下,显示出略高的吸振效能,但随着冲击载荷增大,非光滑NES的吸振效能要优于纯立方NES。并且,两种NES的最优吸振效能随载荷的变化规律表明,在大冲击载荷作用下优化后的非光滑NES具有更为优越的吸振效能。
The variation laws of optimal parameters of parallel purely cubic stiffness nonlinear energy sink(NES)and parallel non-smooth NES are studied,and their vibration absorption efficiencies are compared and analyzed.The dynamic equations of the system connecting parallel purely cubic stiffness NES and parallel non-smooth NES are derived respectively by using Hamilton principle,and the optimal vibration absorption efficiencies and optimal parameters of the two NESs are obtained and compared by using particle swarm optimization.The results show that the purely cubic NES has slightly higher vibration absorption efficiency under medium load before optimization.However,with the increase of impact load,the vibration absorption efficiency of the non-smooth NES is better than that of purely cubic NES.Furthermore,the variation laws of vibration absorption efficiency of the two NESs with the load demonstrate that the non-smooth NES exhibits much better absorption efficiency under large impact load than the purely cubic NES.
作者
李建玲
陈建恩
LI Jianling;CHEN Jianen(Tianjin Key Laboratory of Design and Intelligent Control of Advanced Mechatronical System,Tianjin University of Technology,Tianjin 300384,China;National Experimental Teaching Demonstration Center of Mechanical and Electrical Engineering,Tianjin University of Technology,Tianjin 300384,China)
出处
《噪声与振动控制》
CSCD
北大核心
2023年第5期26-32,共7页
Noise and Vibration Control
基金
国家自然科学基金资助项目(11872274)。
关键词
振动与波
非线性能量阱
冲击载荷
吸振效能
参数优化
粒子群算法
vibration and wave
nonlinear energy sink
impact load
vibration absorption efficiency
parameter optimization
particle swarm optimization
