高速铁路声屏障宽频穿孔吸声降噪结构  

Multi-Layer Micro-Perforated Panels with Broadband Absorption for Reduction of High-Speed Railway Noise

作　　者：盛峰 姜在秀[3,4] 贺银芝 曾小清 邓波[6] 安雪晖[1] 俞悟周 SHENG Feng;JIANG Zaixiu;HE Yinzhi;ZENG Xiaoqing;DENG Bo;AN Xuehui;YU Wuzhou(School of Civil Engineering,Tsinghua University,Beijing 100084,China;Powerchina Roadbridge Group Co.,Ltd.,Beijing 100070,China;School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;Shanghai Key Laboratory of Vehicle Aerodynamics and Vehicle Thermal Management Systems,Tongji University,Shanghai 201804,China;School of Automotive Studies,Tongji University,Shanghai 201804,China;Key Laboratory of Road and Traffic Engineering of the Ministry of Education,Tongji University,Shanghai 201804,China)

机构地区：[1]清华大学土木水利学院,北京100084 [2]中电建路桥集团有限公司,北京100070 [3]同济大学物理科学与工程学院,上海200092 [4]上海市地面交通工具空气动力与热环境模拟重点实验室,上海201804 [5]同济大学汽车学院,上海201804 [6]同济大学道路与交通工程教育部重点实验室,上海201804

出　　处：《同济大学学报（自然科学版）》2024年第9期1469-1473,共5页Journal of Tongji University:Natural Science

基　　金：国家重点研发计划(2022YFE0208000);国家自然科学基金(11874290);中央高校基本科研业务费专项资金。

摘　　要：采用传递矩阵法对高铁声屏障的多层微穿孔结构的吸声进行计算。对给定空腔深度,适当增加具有不同声阻抗的微穿孔板可改善吸声性能。经遗传算法得到具有优化参数的4层和5层微穿孔结构可显著拓宽吸声频带,提高整个频带的吸声系数,在200~3150 Hz频率范围内的平均吸声系数分别为0.70和0.80,吸声频带涵盖250~350 km⋅h^(-1)高速铁路主要噪声频率范围。5层结构在400~4000 Hz频率范围内吸声系数可达0.8。Based on the transfer matrix method,the calculation of absorption of multi-layer micro-perforated panels(MPP)is conducted.Properly increasing the number of layers with different impedance in given cavity depths can improve sound absorption performance.The 4-layer and 5-layer micro-perforated panels with optimized parameters obtained by genetic algorithm can significantly broaden the sound absorption frequency bandwidth and improve the absorption coefficient of the whole frequency range,with an average absorption of 0.7 and 0.8 respectively in the range of 200–3150 Hz which covers the main noise frequency range of high-speed train at 250–350 km•h^(−1).For 5-layer absorbers,absorption coefficients can be higher than 0.8 at 400–4000 Hz.

关 键 词：高速铁路 噪声 声屏障 微穿孔 

分 类 号：O429[理学—声学]