# [1]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.[doi:10.3969/j.issn.1001-0505.2017.05.034] 　Song Xiaodong,Li Qi,Wu Dingjun.Prediction method for noise attenuation in elevated rail transit lines[J].Journal of Southeast University (Natural Science Edition),2017,47(5):1055-1061.[doi:10.3969/j.issn.1001-0505.2017.05.034] 点击复制 一种轨道交通高架线路噪声衰减规律的预测方法() 分享到： var jiathis_config = { data_track_clickback: true };

47

2017年第5期

1055-1061

2017-09-20

## 文章信息/Info

Title:
Prediction method for noise attenuation in elevated rail transit lines

1东南大学交通学院, 南京 210096; 2同济大学桥梁工程系, 上海 200092
Author(s):
1School of Transportation, Southeast University, Nanjing 210096, China
2Department of Bridge Engineering, Tongji University, Shanghai 200092, China

Keywords:

U448.21;TB532
DOI:
10.3969/j.issn.1001-0505.2017.05.034

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.

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