东南大学学报（自然科学版）2017，Vol.47Issue(5)：1055-1061,7.DOI:10.3969/j.issn.1001-0505.2017.05.034
一种轨道交通高架线路噪声衰减规律的预测方法
Prediction method for noise attenuation in elevated rail transit lines
摘要
Abstract
A numerical method based on the two-dimensional (2D) vibro-acoustic model was proposed to predict the sound attenuation of rail noises and bridge noises in elevated rail transit lines.First,a refined two-and-a-half dimensional (2.5D) acoustic model was used to evaluate the applicability of the traditional simplified line source model.Then,the theoretical plate model and three-dimensional (3D) vehicle-track-bridge coupling model were used to discuss the feasibility of using the 2D model to simulate the vibrations of 3D bridges and rails.Finally,the 2D vibro-acoustic model was used to calculate the sound attenuation of bridge noises and rail noises in the far field.The accuracy of the 2D method was validated by compared wilhe the results obtained by the 2.5D method.The research shows that the variation of the bridge vibration and the rail vibration is insignificant along the longitudinal axis of the track above 100 Hz.The proposed 2D method for the simulation of bridge noise and rail noise attenuation can achieve a certain accuracy above 100 Hz,and thus it can predict the A-weighted sound pressure levels in the far field.关键词
轨道交通/高架线路/噪声预测/噪声衰减Key words
urban rail transit/elevated lines/noise prediction/noise attenuation分类
交通工程引用本文复制引用
宋晓东,李奇,吴定俊..一种轨道交通高架线路噪声衰减规律的预测方法[J].东南大学学报（自然科学版）,2017,47(5):1055-1061,7.基金项目
国家自然科学基金资助项目(51608116)、江苏省自然科学基金资助项目(BK20160681). （51608116）
