Modal Strain Based Method for Dynamic Design of Plate-Like StructuresReport as inadecuate




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Shock and Vibration - Volume 2016 2016, Article ID 2050627, 10 pages -

Research Article

Department of Engineering Mechanics, Southeast University, Nanjing 210096, China

Department of Civil and Environmental Engineering and Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA

Jiangsu Key Laboratory of Engineering Mechanics, Nanjing 210096, China

Department of Mechanics, University of Belgrade, 11120 Belgrade, Serbia

State Key Laboratory of Space Physics, Beijing 100076, China

Received 4 July 2016; Revised 22 September 2016; Accepted 17 October 2016

Academic Editor: Carlo Rainieri

Copyright © 2016 Yadong Zhou et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Design optimization of dynamic properties, for example, modal frequencies, can be of much importance when structures are exposed to the shock and-or vibration environments. A modal strain based method is proposed for fast design of natural frequencies of plate-like structures. The basic theory of modal strains of thin plates is reviewed. The capability of determining the highly sensitive elements by means of modal strain analysis is theoretically demonstrated. Finite element models were constructed in numerical simulations. Firstly, the application of the proposed method is conducted on a central-massed flat plate which was topologically optimized by the Reference. The results of modal strain analysis at the first mode have good agreement with the results from the topology optimization. Furthermore, some features of the strain mode shapes SMSs of the flat plate are investigated. Finally, the SMSs are applied to the optimization of a stiffened plate. Attention is focused on the distributions of the SMSs of the stiffeners, which also shows good agreement with the results from the topology optimization in the previous study. Several higher orders of SMSs are extracted, which can visualize the most sensitive elements to the corresponding modal frequency. In summary, both the theory and simulations validate the correctness and convenience of applying SMSs to dynamic design of plate-like structures.





Author: Yadong Zhou, Shaoqing Wu, Natasa Trisovic, Qingguo Fei, and Zhiyong Tan

Source: https://www.hindawi.com/



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