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http://dx.doi.org/10.7734/COSEIK.2014.27.5.421

Study on the Structural Optimization based on Equivalent Static Load under Dynamic Load  

Kim, Hyun-Gi (Korea Aerospace Research Institute)
Kim, Euiyoung (School of Mechanical and Aerospace Engineering, Seoul National Univ.)
Cho, Maenghyo (School of Mechanical and Aerospace Engineering, Seoul National Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.27, no.5, 2014 , pp. 421-427 More about this Journal
Abstract
Most of the structure of the real world is influenced under dynamic loads. However, when structure analysis and the structural optimization is performed, it is assumed that the static load acts on structure. When considering the actual load of dynamic loads in order to take into account a variety of loads, computational resources and time becomes a big burden in terms of cost. However, considering only the simple static load condition is not preferable for structural safety. For this reason, a lot of studies have been conducted trying to compensate this trouble by applying weight factor or replacing dynamic load with the equivalent static load. In this study, structural optimization techniques for structures under dynamic loads is proposed by applying the equivalent static load. From previous study, after determining the positions of equivalent static load based on primary degrees of freedom, the equivalent static load is calculated through the optimization process. In this process, the equivalent static load optimization of previous research is complemented by adding constraints to avoid excessively large load extraction. In numerical examples, dynamic load is applied to the truss structure and the plate. Then, the reliability of the proposed optimization technique is verified by carrying out size optimization with the equivalent static load.
Keywords
equivalent static load; primary degrees of freedom; global optimization; simulated annealing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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