噪声与振动控制2017，Vol.37Issue(5)：88-91,4.DOI:10.3969/j.issn.1006-1355.2017.05.019
基于声学灵敏度的槽形梁结构参数影响分析
Study on Structure-acoustic Sensitivity Analysis of Trough Girders for Rail Transit
摘要
Abstract
In order to study the influence of structural parameters of trough girders on structure-borne noise, the finite element model of the trough girder is established based on the theory of vehicle-track coupling dynamics, and the vibration response of the trough girder under the train load excitation is calculated. The indirect boundary element method is used to calculate and analyze the noise characteristics of the trough girder. Then, the finite difference method is used to calculate the structure-acoustic sensitivity of the trough girder. The impact of the floor, the flange and web thicknesses on the sound pressure level in acoustic field in different frequency ranges are analyzed. The results show that the peak frequency of the noise of the rail transit trough girder is 31.5 Hz-80 Hz. Thickening the floor will help control the structural noise in a small area adjacent to the bridge, but it has little effect on the field far away from the bridge. Thickening the web will increase the maximum sound pressure level in the field near the bridge, and also has some effect on noise reduction for the far field of the bridge. In addition, thickening the floor and the web simultaneously only has small effect on the sound pressure at the field points for the frequency above 100 Hz, and the influence of the flange thickness on structure-borne noise of the trough girder is also small.关键词
声学/槽形梁/间接边界元/有限差分法/结构-声学灵敏度Key words
acoustics/trough girder/indirect boundary element method/finite difference method/structural-acoustic sensitivity分类
交通工程引用本文复制引用
刘林芽,秦佳良,宋瑞,曾峰..基于声学灵敏度的槽形梁结构参数影响分析[J].噪声与振动控制,2017,37(5):88-91,4.基金项目
江西省创新团队资助项目(2015BCB24007) （2015BCB24007）
江西省研究生创新专项资金资助项目(YC2016-s248) （YC2016-s248）
