噪声与振动控制2025，Vol.45Issue(2)：26-31,6.DOI:10.3969/j.issn.1006-1355.2025.02.005
组合式周期单元声学覆盖层吸声机理研究及优化设计
Sound Absorption Mechanism Study and Optimization Design of Acoustic Coating of Composite Periodic Units
摘要
Abstract
Aiming at the low-frequency broadband sound absorption problem of underwater acoustic coating,three combined models were proposed.By combining the periodic units commonly used in engineering along the thickness direc-tion,the finite element acoustic absorption models with upper and lower cavities,hard core and cavity combination,local res-onance phononic crystal and cavity combination were established respectively.The sound absorption advantages of different combined structures relative to single-layer structures were compared and analyzed,and the mechanism of combined period-ic units was studied to broaden the sound absorption band.On this basis,the Nelder-Mead gradient-free optimization algo-rithm was used to optimize the sound absorption performance of the three combined periodic units.The results show that by arranging different types of units along the thickness direction and coupling the resonance peaks of different frequencies,the sound absorption frequency band can be effectively broadened.This study provides a technical reference for the low-frequen-cy broadband design of acoustic coatings and has a certain engineering guiding significance.关键词
声学/组合式/周期单元/声学覆盖层/吸声机理/优化设计Key words
acoustics/composite/periodic unit/acoustic coating/sound absorption mechanism/optimization design分类
通用工业技术引用本文复制引用
黄一帆,胡昊灏,王康,朱瑞祺..组合式周期单元声学覆盖层吸声机理研究及优化设计[J].噪声与振动控制,2025,45(2):26-31,6.基金项目
国家自然科学基金资助项目(52201366) （52201366）
