Topological Design of Two-Dimensional Phononic Crystals Based on Genetic Algorithm

Phononic crystals are a kind of artificial acoustic metamaterial whose mass density and elastic modulus are periodically arranged. The precise and efficient design of phononic crystals with specific bandgap characteristics has attracted increasing attention in past decades. In this paper, an improve...

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Veröffentlicht in:Materials Jg. 16; H. 16; S. 5606
Hauptverfasser: Wen, Xiaodong, Kang, Lei, Sun, Xiaowei, Song, Ting, Qi, Liangwen, Cao, Yue
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Basel MDPI AG 13.08.2023
MDPI
Schlagworte:
Acoustic insulation
Acoustics
Adaptive algorithms
Algorithms
Crystal structure
Crystals
Design
Energy bands
Energy gap
Finite element method
Genetic algorithms
Metamaterials
Methods
Modulus of elasticity
Noise control
Optimization techniques
Transmission loss
Vibration
Wave attenuation
ISSN:1996-1944, 1996-1944
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Zusammenfassung:Phononic crystals are a kind of artificial acoustic metamaterial whose mass density and elastic modulus are periodically arranged. The precise and efficient design of phononic crystals with specific bandgap characteristics has attracted increasing attention in past decades. In this paper, an improved adaptive genetic algorithm is proposed for the reverse customization of two-dimensional phononic crystals designed to maximize the relative bandwidth at low frequencies. The energy band dispersion relation and transmission loss of the optimal structure are calculated by the finite-element method, and the effective wave-attenuation effect in the bandgap range is verified. This provides a solution for the custom-made design of acoustic metamaterials with excellent low-frequency bandgap sound insulation or other engineering applications.
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ISSN:1996-1944
1996-1944
DOI:10.3390/ma16165606