Indirect inverse substructuring identification method for coupling dynamic stiffness of vibrational structures  

作　　者：LU Guangqing WANG Minqing WANG Bo CAO Renjing GUO Zhiwei PENG Wenbin LIU Yujun 

机构地区：[1]MOE Key Lab of Disasters Forecast and Control in Engineering, Jinan University Guangzhou 510632 [2]Research Institute of Shenzhen, Northwestern Polytechnical University Shenzhen 518057 [3]School of Marine Science and Technology, Northwestern Polytechnical University Xi'an 710072

出　　处：《Chinese Journal of Acoustics》2018年第2期241-256,共16页声学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(51475211);National Program on Key Basic Research Project(973 Program,61324702.3.2);Provincial-ministerial University-industry Cooperation Project of Guangdong Provincial Department of Science and Technology(20138090600142)

摘　　要：Coupling dynamic stiffness is a key parameter in vibrational analysis of complex coupled structures, for both estimation of structural vibrational characteristics and design of vibration control. An indirect method of inverse substructuring analysis to identify the stiffness is studied further by using frequency response functions that are tested on the models of coupled structures. The theoretical effectiveness of this method is here verified by two ＇mass-rubber＇ ex- perimental models constructed as two-level substructures with mono-coupling and tri-coupling connections, and the identification error is also analyzed. The coincidence of numerical and experimental results show that the indirect method has better feasibility and effectiveness than the existing direct method of inverse substructuring analysis, and with more applicable con- ditions and higher acceptable precision in determining the stiffness. It provides more solid theoretical basis for the stiffness identification by inverse substructuring analysis.Coupling dynamic stiffness is a key parameter in vibrational analysis of complex coupled structures, for both estimation of structural vibrational characteristics and design of vibration control. An indirect method of inverse substructuring analysis to identify the stiffness is studied further by using frequency response functions that are tested on the models of coupled structures. The theoretical effectiveness of this method is here verified by two ＇mass-rubber＇ ex- perimental models constructed as two-level substructures with mono-coupling and tri-coupling connections, and the identification error is also analyzed. The coincidence of numerical and experimental results show that the indirect method has better feasibility and effectiveness than the existing direct method of inverse substructuring analysis, and with more applicable con- ditions and higher acceptable precision in determining the stiffness. It provides more solid theoretical basis for the stiffness identification by inverse substructuring analysis.

分 类 号：O327[理学—一般力学与力学基础]