Optimal topology design of replaceable bar dampers of a reticulated shell based on sensitivity analysis
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- 作者：Yang Yang (1)
Hui Ma (2) - 关键词：topology optimization ; reticulated shells ; failure analysis ; sensitivity analysis ; replaceable elements
- 刊名：Earthquake Engineering and Engineering Vibration
- 出版年：2014
- 出版时间：March 2014
- 年：2014
- 卷：13
- 期：1
- 页码：113-124
- 全文大小：1,292 KB
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Hui Ma (2)
1. College of Naval Architecture, Dalian University of Technology, Dalian, 116024, China
2. College of Resource and Civil Engineering, Northeastern University, Shenyang, China - ISSN：1993-503X
文摘
In this study, a method for control of reticulated shells is proposed and its practicality is demonstrated. The control is implemented by replacing selected bars of the shell with passive viscoelastic dampers. By applying the eigenvalue perturbation technique and the earthquake spectrum concept, the sensitivities of various topologies of the shell are analyzed, and the optimal topology is determined by taking their symmetries into consideration. The results of this research show that common damper topologies are not effective for all types of responses and recorded earthquakes. The optimal topology identifi ed requires a minimal number of dampers for each type of earthquake record. The displacement control effect of the dynamic responses of the optimal topology is 10%-0%; the acceleration control effect is also about 10%-0%; and the axial force control effect is as much as 30%-5%. Furthermore, the incremental dynamic analysis (IDA) method is used to investigate the stability of the controlled shell. The results show that the dynamic stability of the controlled shell is well preserved when it is vibrated under vibration and is better than the uncontrolled shell. The ultimate load increased by 10% and the elements entered into the plastic stage when the peak acceleration reached 580 Gal, which is 200 Gal larger than the uncontrolled shell.