|Table of Contents|

Test on vibration noise of rail corrugation section on urban rail transit viaduct(PDF)

《交通运输工程学报》[ISSN:1671-1637/CN:61-1369/U]

Issue:
2021年03期
Page:
159-168
Research Field:
道路与铁道工程
Publishing date:

Info

Title:
Test on vibration noise of rail corrugation section on urban rail transit viaduct
Author(s):
SONG Li-zhong1;  FENG Qing-song1;  SUN Kun2;  LIU Quan-min1;  LUO Yun-ke3
(1. Engineering Research Center of Railway Environmental Vibration and Noise of Ministry of Education, East China Jiaotong University, Nanchang 330013, Jiangxi, China; 2. China Railway Siyuan Survey and Design Group Co., Ltd.,Wuhan 430063, Hubei, China; 3. National Rail Transit Electrification and Automation Engineering Technology Research Center(Hong Kong Branch), The Hong Kong Polytechnic University, Hong Kong 999077, China)
Keywords:
urban rail transit;  viaduct;  rail corrugation;  vibration and noise;  test
PACS:
U24
DOI:
10.19818/j.cnki.1671-1637.2021.03.009
Abstract:
To explore the influences of vibration and noise of rail corrugation sections of urban rail transit viaducts on the environment along railway lines, field tests were carried out on the vibration and noise of a rail corrugation section on an urban rail transit viaduct induced by train passing at different speeds. Based on the field test results, the influences of train speed on the vibration and noise of urban rail transit viaduct were analyzed, and the spatial distribution characteristics of the noise of urban rail transit viaduct were studied. The formations of vibration and noise peaks of rail corrugation section were explained. Research results show that the peak sound pressures 7.5 m away from the central line of track and 1.2 m above the rail surface are about 0.6, 0.9, 1.3, 1.9, 2.3, and 3.3 Pa when the train passes through the rail corrugation section on the urban rail transit viaduct at speed of 20, 40, 60, 80, 100, and 110 km·h-1, respectively. The area above the rail surface is mainly affected by the wheel-rail noise, while the area below the beam is primarily affected by the bridge structure-borne noise. There is a strong linear correlation between the wheel-rail noise and the train speed, whereas the linear correlation between the bridge structure-borne noise and the train speed is slightly lower. When the train speed increases by 10 km·h-1, the wheel-rail noise and the bridge structure-borne noise increase by about 1.7 and 1.1 dB, respectively. The attenuation law of the noise of urban rail transit viaduct with the distance is consistent under different train speeds. The measured noise decreases by about 4.33 dB when the distance between the measuring point and the central line of track is doubled. The effect of rail corrugation on the wheel-rail noise of urban rail transit viaduct is significant. The rail corrugation wavelength determines the peak frequencies of rail vibration accelerations when the train passes over the bridge at different speeds, which in turn affects the peak frequencies of wheel-rail noise. The peak frequency of urban rail transit viaduct structure-borne noise is mainly related to the bridge vibration characteristics, and it has little relation to the train speed and the rail corrugation. 1 tab, 10 figs, 31 refs.

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Last Update: 2021-07-20