期刊
PHYSICS LETTERS A
卷 378, 期 4, 页码 434-441出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physleta.2013.12.003
关键词
Phononic crystal; Bandgap width; Topology optimization; Fuzzy granulation; Asymmetrical structure
资金
- National Natural Science Foundation of China [11002018, 10632020]
- National High Technology Research and Development Program of China (863 Program) [2013AA030901]
- German Federal Ministry of Education and Research (BMBF) [11/045]
The multiple elitist genetic algorithm with the adaptive fuzzy fitness granulation (AFFG) is used to design the phononic crystals with large relative bandgap width (BGW) for combined out-of-plane and in-plane wave modes. Without assumption on the symmetry of the unit-cell, we obtain an asymmetrical phononic crystal with the relative BGW which is quite larger than that of the optimized symmetrical structure. With the help of AFFG, the number of the fitness function evaluations is reduced by over 50% and the procedure converges 5 times faster than the conventional evolutionary algorithm to reach the same final fitness values. (C) 2013 Elsevier B.V. All rights reserved.
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