具有动边界的刚-柔耦合系统模态实验研究  

Modal experiment study of rigid-flexible coupling system with moving boundary

作　　者：徐义武 张素侠[1] Xu Yiwu;Zhang Suxia(School of Mechanical Engineering,Tianjin University,300354,Tianjin,China)

机构地区：[1]天津大学机械工程学院,天津300354

出　　处：《应用力学学报》2021年第2期474-479,共6页Chinese Journal of Applied Mechanics

基　　金：国家自然科学基金(51479136)。

摘　　要：系缆和系留的刚体构成了刚-柔耦合系统。本文采用非接触式测量方法,对具有动边界的刚-柔耦合系统模态进行了实验研究,分析了刚体质量和动边界对系缆模态的影响规律。结果表明:动边界条件下系缆的振型趋势改变,与固定边界条件相比,系缆的固有频率减小,阻尼比增大;刚体的存在使系缆第一阶固有频率减小、阻尼比增大,第二阶固有频率和阻尼比都增大,振型改变。Tethered cable and tethered rigid body,constitute a rigid flexible coupling system.In this paper,the non-contact measurement method is used to study the mode of rigid flexible coupling system with dynamic boundary,and the influence of rigid body mass and dynamic boundary on the cable mode is analyzed.Results show that under dynamic boundary conditions,the trend of the mode shape of the tethered cable changes,the frequency of the tethered cable decreases,and the damping ratio increases.The existence of rigid body reduces the first-order natural frequency of the tethered cable,increases the damping ratio,increases the second-order frequency and damping ratio,and changes the mode shape.

关 键 词：系缆 动边界 刚体 模态实验 

分 类 号：O329[理学—一般力学与力学基础] TB123[理学—力学]