Influence of the curvature of the viaduct on train-induced vibration of semi-closed noise barriers in urban rail transit
XIE Weiping1，HU Zhe2，ZHANG Liangtao2，HUA Yumeng1
1.School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;
2.China Railway Siyuan Survey and Design Group Co., Ltd., Wuhan 430063, China
Taking an urban rail transit elevated line as the engineering background, field measurements have been made on the acceleration of the semi-closed noise barrier when a train was traveling in straight and curved sections, and time history and spectrum analysis were performed on the measured data.Based on the theory of vehicle-line-bridge coupled vibration, by establishing a vehicle-curve bridge-noise barrier structure vibration analysis model, the accuracy of the model was verified by comparison with the measured data.Based on the simulation model, the influence of the curvature of the viaduct on train-induced vibration of semi-closed noise barriers was analyzed.The results show that: In the urban rail transit elevated line, the train-induced vibration response of the semi-closed noise barriers in the curved section was greater than that in the straight line segment.The dominant frequency band of the main lateral vibration is 70—140 Hz, and the peak value of the lateral vibration displacement is linearly positively correlated with the curvature.The fitting formula was obtained, and the vibration response of the semi-closed noise barrier on the viaduct with different curvature could be approximated.
谢伟平1，胡喆2，张良涛2，花雨萌1. 城市轨道交通高架桥曲率对半封闭式声屏障车致振动影响研究[J]. 振动与冲击, 2020, 39(24): 128-133.
XIE Weiping1，HU Zhe2，ZHANG Liangtao2，HUA Yumeng1. Influence of the curvature of the viaduct on train-induced vibration of semi-closed noise barriers in urban rail transit. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(24): 128-133.
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