对接圆柱壳结构的频响函数子结构混合建模方法研究  

Research on sub-structure hybrid modeling method based on frequency response function for butted cylindrical shell structures

作　　者：李旭龙 张忠[3] 董俊辉 牛牧青 魏莎 陈立群[1,2] LI Xu-long;ZHANG Zhong;DONG Jun-hui;NIU Mu-qing;WEI Sha;CHEN Li-qun(School of Mechanics and Engineering Science,Shanghai University,Shanghai 200444,China;Shanghai Institute of Applied Mathematics and Mechanics,Shanghai 200072,China;Science and Technology on Reliability and Environment Engineer Laboratory,Beijing Institute of Structure and Environment Engineering,Beijing 100076,China;School of Science,Harbin Institute of Technology,Shenzhen,Shenzhen 518055,China)

机构地区：[1]上海大学力学与工程科学学院,上海200444 [2]上海市应用数学和力学研究所,上海200072 [3]北京强度环境研究所可靠性与环境工程技术重点实验室,北京100076 [4]哈尔滨工业大学(深圳)理学院,广东深圳518055

出　　处：《振动工程学报》2023年第1期70-75,共6页Journal of Vibration Engineering

基　　金：国家自然科学基金资助项目(12072181,11702170);机械系统与振动国家重点实验室课题资助项目(MSV202105)。

摘　　要：以建立精确的对接圆柱壳结构动力学模型为目标,为解决对接圆柱壳结构实验模型存在的界面转角自由度信息缺失的问题,提出了频响函数子结构混合建模方法,采用界面刚性等效方法进行界面转角自由度信息的近似估计,并将其与有限元频响结果进行对比分析,验证了该方法在圆柱壳结构中的计算精度。同时,根据子结构频响函数获取方式、界面自由度的不同,采用子结构频响函数综合方法进行多种工况下的混合建模。结合对接圆柱壳结构的振动特性,对比分析不同工况下的混合建模结果。结果表明:考虑界面转角自由度信息后,可有效提高对接圆柱壳结构的混合建模精度。In order to establish an accurate dynamic model of butted cylindrical shell structures and to solve the problem of lack of information of rotational degrees of freedom in the experimental model of butted cylindrical shell structures,the frequency response function based sub-structuring synthesis method is proposed.The equivalent multi-point connection method is used to approximate⁃ly estimate the information of rotational degrees of freedom.Then the results are compared with the frequency response function re⁃sults of the finite element method,verifying the accuracy of the method for cylindrical shell structure.At the same time,according to the different ways of obtaining the frequency response function of the substructure and the degree of freedom of the interface,the frequency response function based sub-structuring synthesis method is used for the hybrid modeling under various working condi⁃tions.Combined with the vibration characteristics of the butted cylindrical shell structure,the hybrid modeling results under differ⁃ent working conditions are compared and studied.Results show that the hybrid modeling accuracy of the butted cylindrical shell structure can be effectively improved by considering the information of rotational degrees of freedom of interface.

关 键 词：圆柱壳结构 子结构综合 混合建模 频响函数 转角自由度 

分 类 号：TB123[理学—工程力学]