《结构与土木工程前沿（英文）》
>> 2019年
第13卷
第1期
doi:
10.1007/s11709-018-0478-2
RESEARCH ARTICLE
Border-search and jump reduction method for size optimization of spatial truss structures
1. Department of Civil Engineering, Velayat University, Iranshahr 9911131311, Iran
2. Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan 9816745845, Iran |
录用日期：
2018-05-29
发布日期：
2019-01-04
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摘要
This paper proposes a sensitivity-based border-search and jump reduction method for optimum design of spatial trusses. It is considered as a two-phase optimization approach, where at the first phase, the first local optimum is found by few analyses, after the whole searching space is limited employing an efficient random strategy, and the second phase involves finding a sequence of local optimum points using the variables sensitivity with respect to corresponding values of constraints violation. To reach the global solution at phase two, a sequence of two sensitivity-based operators of border-search operator and jump operator are introduced until convergence is occurred. Sensitivity analysis is performed using numerical finite difference method. To do structural analysis, a link between open source software of OpenSees and MATLAB was developed. Spatial truss problems were attempted for optimization in order to show the fastness and efficiency of proposed technique. Results were compared with those reported in the literature. It shows that the proposed method is competitive with the other optimization methods with a significant reduction in number of analyses carried.
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