Topological Design of Two-Dimensional Phononic Crystals Based on Genetic Algorithm
Open Access
Abstract
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.Keywords
Funding Information
- Youth Science and Technology Foundation of Gansu Province (21JR7RA338, 2021CYZC-07, 2nd Batch)
- Industrial Support and Guidance Project of colleges and universities of Gansu Province (21JR7RA338, 2021CYZC-07, 2nd Batch)
- Tianyou Youth Talent Lift Program of Lanzhou Jiaotong University (21JR7RA338, 2021CYZC-07, 2nd Batch)
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