基于动刚度功率流法的组合板结构振动特性分析  

Vibration characteristics of built-up plate structures based on dynamic stiffness power flow approach

作　　者：钟奎奎 李江涛[2] 吴文伟[1] 李慧 ZHONG Kui-kui;LI Jiang-tao;WU Wen-wei;LI Hui(China Ship Scientific Research Center,Wuxi 214082,China;Marine Design&Research Institute of China,Shanghai 200011,China)

机构地区：[1]中国船舶科学研究中心,江苏无锡214082 [2]中国船舶及海洋工程设计研究院,上海200011

出　　处：《船舶力学》2019年第11期1360-1368,共9页Journal of Ship Mechanics

摘　　要：本文采用动刚度功率法,计入面内振动和面外振动,分析了组合板结构的振动特性。首先采用动刚度法研究了L型板在均匀激励下的位移空间分布及频率响应,并与有限元结果进行了对比验证。然后,以双层底结构为例,采用动刚度功率流法分析了不同激励条件下其振动响应及功率流。结果表明,动刚度功率流法可以清晰地给出复杂结构内的功率流信息,对于研究复杂板架结构的动力学特性、振动传递及波形转换等的力学机理有重要参考价值。In this paper,the dynamic stiffness method is adopted to analyse the vibrational characteristics of plate structures,considering both in-plane and out-of-plane waves.Through the use of dynamic stiffness method,the displacement contour and frequency response of the L-shaped plate under uniform excitation are studied.This method is validated through comparing the results from DSM and those from FEM.Then,taking a double bottom tank as an example,the vibrational response and power flows are analyzed by dynamic stiff ness power flow approach.The results show that dynamic power flow approach can clearly display the power flow information within complex structures and can easily give the dynamic stiffness matrix of complex struc tures,which is helpful to study the dynamic mechanism,vibration transmission and waveform conversion of complex plate structures.

关 键 词：动刚度功率流法 L型板 双层底 有限元 

分 类 号：U661.4[交通运输工程—船舶及航道工程]