人工晶体学报2024，Vol.53Issue(10)：1720-1728,9.
基于LightGBM和遗传算法的二维层状声子晶体结构设计
Design of Two-Dimensional Layered Phononic Crystal Structures Based on LightGBM and Genetic Algorithm
摘要
Abstract
Phononic crystals are periodically artificial composite structures that have garnered widespread attention for their bandgap properties and potential applications in wave propagation control,offering novel solutions for engineering vibration and noise reduction.The design of these materials is a current research focus.This study takes two-dimensional layered phonon crystal structure as an example,presents an innovative method for designing two-dimensional layered phononic crystal structures,utilizing LightGBM and an improved genetic algorithm.Initially,the LightGBM algorithm was employed for bandgap prediction of the phononic crystals,with the structural arrangement vectors subjected to categorical feature processing,and hyperparameter tuning conducted through the simulated annealing algorithm,achieving a prediction accuracy with an overall error of no more than 2％within 1/3134 of the traditional finite element method computation time.Subsequently,a design method integrating a genetic algorithm based on an elite preservation strategy was introduced.Using the environmental vibration issue caused by subway operation as an example,a fitness function optimized for bandgap width was established,resulting in a population with structural bandgaps covering the 30～40 Hz frequency range.Finally,finite element analysis of one structure verified its bandgap characteristics align closely with expectations.This research provides a new solution for the efficient optimization design of multiple phononic crystal structure schemes.关键词
声子晶体/遗传算法/LightGBM/结构设计/减振特性/带隙Key words
phononic crystal/genetic algorithm/LightGBM/structural design/vibration reduction characteristic/bandgap分类
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楚凡,赵春风..基于LightGBM和遗传算法的二维层状声子晶体结构设计[J].人工晶体学报,2024,53(10):1720-1728,9.基金项目
国家自然科学基金面上项目(52278302) （52278302）
