Identification of thin plate dynamic loads based on inverse finite element method and displacement mode shape functions

被引：0
|
作者：
Li, Kelu [1 ,2 ]
Xiao, Longfei [1 ,2 ,3 ]
Liu, Mingyue [1 ,2 ,3 ]
Kou, Yufeng [1 ]
Wei, Handi [1 ,2 ,3 ]
机构：
[1] State Key Laboratory of Oeean Engineering, Shanghai Jiao Tong University, Shanghai
[2] Institute of Marine Equipment, Shanghai Jiao Tong University, Shanghai
[3] Sanya Yazhou Bay Institute of Deepsea Science and Technology, Shanghai Jiao Tong University, Sanya
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2024年 / 43卷 / 21期
关键词：
displacement mode shape; dynamic load identification; inverse finite element method (iFEM); strain response; thin plate;
D O I：
10.13465/j.cnki.jvs.2024.21.032
中图分类号：
学科分类号：
摘要：
Dynamic load identification is of great significance for structural design and health monitoring. Here, a thin plate dynamic load identification method based on inverse finite element method (iFEM) and displacement mode shape functions was proposed using strain responses easily obtained in engineering practice. It could simultaneously identify spatial distribution and time history of dynamic loads. Firstly, iFEM could be used to reconstruct discrete displacement field with discrete strain data. Then, the discrete displacement field and displacement mode shape functions were used to fit the continuous displacement field, and the well fitted mode shape functions were substituted into thin plate vibration differential governing equations to determine dynamic loads to be identified. Finally, the feasibility and accuracy of this method were verified with two numerical examples of identifying concentrated loads and globally distributed loads on thin plate. The results showed that the proposed method is effective and accurate for identifying dynamic loads on thin plate. © 2024 Chinese Vibration Engineering Society. All rights reserved.
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页码：284 / 290
页数：6
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