Inverse substructuring methods for identifying coupling dynamic stiffness of mechanical assembly

被引：0

作者：

Lü G. ^{[1
]}

Yi C. ^{[2
]}

Fang K. ^{[1
]}

机构：

[1] MOE Key Lab of Disasters Forecast and Control in Engineering, Jinan University, Guangzhou

[2] School of Mechanical Engineering, Qingdao Technological University, Qingdao

来源：

Jixie Gongcheng Xuebao/Journal of Mechanical Engineering | 2016年 / 52卷 / 09期

关键词：

Coupling dynamic stiffness; Frequency response function; Inverse substructuring identification; Mechanical assembly;

D O I：

10.3901/JME.2016.09.086

中图分类号：

学科分类号：

摘要：

In order to inspect dynamic quality of mechanical assembly, the effects of assembling process on the dynamic transferring characteristics of the involved components are analyzed by substructuring analysis, and coupling dynamic stiffness of the assembly is clarified explicitly as the unique dominant factor for the dynamic quality. After explaining direct inverse substructuring approach of identification on the stiffness (direct approach) and analyzing its defects in practical application, five types of indirect inverse substructuring approaches (indirect approach) are established using spectral-based frequency response functions (FRFs), including their formulations in cases of single- and multi-coupling connection(s) of assembling process, and their applicable engineering conditions. Analytical results show that, the five types of indirect approaches overcome totally or partially the test-difficulty of the direct one. In addition, the first type indirect approach is relatively not susceptible to FRF-measurement errors, as it does by the direct one, and can be applied as an optimum indirect approach for identifying the stiffness. Theoretical completeness of the direct and indirect approaches and application effectiveness of the first indirect approach are validated by a lumped-parameter model and its analogic experimental counterpart of two-level assembling substructures, respectively. The inverse substructuring approaches provide a new effective technical method for coupling stiffness identification and dynamic quality inspection of mechanical assembly. © 2016 Journal of Mechanical Engineering.

引用

页码：86 / 95

页数：9

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