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Structural Engineering and Mechanics Volume 77, Number 6, March25 2021 , pages 779-795 DOI: https://doi.org/10.12989/sem.2021.77.6.779 |
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Topology and size optimization of truss structures using an improved crow search algorithm |
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Mostafa Mashayekhi and Roghayeh Yousefi
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| Abstract | ||
| In the recent decades, various optimization algorithms have been considered for the optimization of structures. In this research, a new enhanced algorithm is used for the size and topology optimization of truss structures. This algorithm, which is obtained from the combination of Crow Search Algorithm (CSA) and the Cellular Automata (CA) method, is called CA-CSA method. In the first iteration of the CA-CSA method, some of the best designs of the crow's memory are first selected and then located in the cells of CA. Then, a random cell is selected from CA, and the best design is chosen from the selected cell and its neighborhood; it is considered as a "local superior design" (LSD). In the optimization process, the LSD design is used to modify the CSA method. Numerical examples show that the CA-CSA method is more effective than CSA in the size and topology optimization of the truss structures. | ||
| Key Words | ||
| truss structures; size optimization; topology optimization; crow search algorithm; cellular automata method | ||
| Address | ||
| Mostafa Mashayekhi and Roghayeh Yousefi: Department of Civil Engineering, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran | ||