Size and Topology Optimization for Trusses with Discrete Design Variables by Improved Firefly Algorithm
Autor: | Yue Wu, Qingpeng Li, Qingjie Hu, Andrew Borgart |
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Jazyk: | angličtina |
Rok vydání: | 2017 |
Předmět: |
0209 industrial biotechnology
Mathematical optimization Optimization problem Discretization Article Subject lcsh:Mathematics General Mathematics Topology optimization General Engineering Truss Topology (electrical circuits) 02 engineering and technology lcsh:QA1-939 020901 industrial engineering & automation lcsh:TA1-2040 Discrete optimization 0202 electrical engineering electronic engineering information engineering Embedding 020201 artificial intelligence & image processing Firefly algorithm lcsh:Engineering (General). Civil engineering (General) Mathematics |
Zdroj: | Mathematical Problems in Engineering, Vol 2017 (2017) Mathematical Problems in Engineering: theory, methods and applications, 2017 |
ISSN: | 1024-123X |
DOI: | 10.1155/2017/1457297 |
Popis: | Firefly Algorithm (FA, for short) is inspired by the social behavior of fireflies and their phenomenon of bioluminescent communication. Based on the fundamentals of FA, two improved strategies are proposed to conduct size and topology optimization for trusses with discrete design variables. Firstly, development of structural topology optimization method and the basic principle of standard FA are introduced in detail. Then, in order to apply the algorithm to optimization problems with discrete variables, the initial positions of fireflies and the position updating formula are discretized. By embedding the random-weight and enhancing the attractiveness, the performance of this algorithm is improved, and thus an Improved Firefly Algorithm (IFA, for short) is proposed. Furthermore, using size variables which are capable of including topology variables and size and topology optimization for trusses with discrete variables is formulated based on the Ground Structure Approach. The essential techniques of variable elastic modulus technology and geometric construction analysis are applied in the structural analysis process. Subsequently, an optimization method for the size and topological design of trusses based on the IFA is introduced. Finally, two numerical examples are shown to verify the feasibility and efficiency of the proposed method by comparing with different deterministic methods. |
Databáze: | OpenAIRE |
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