The coupled vibration of train and bridge as high-speed trains meet in crosswind

Wenhua Guo; Xinmin Hong; Chunxia Chen

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The coupled vibration of train and bridge as high-speed trains meet in crosswind

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Purpose–This paper aims to study the influence of aerodynamics force of trains passing each other on the dynamic response of vehicle bridge coupling system based on numerical simulation and multi-body dynamics and put forward the speed threshold for safe running of train under different crosswind speeds.Design/methodology/approach–The computational fluid dynamics method is adopted to simulate the aerodynamic force in the whole process of train passing each other by using dynamic grid technology.The dynamic model of vehicle-bridge coupling system is established considering the effects of aerodynamic force of train passing each other under crosswind,the dynamic response of train intersection on the bridge under crosswind is computed and the running safety of the train is evaluated.Findings–The aerodynamic force of trains’intersection has little effects on the derailment factor,lateral wheel-rail force and vertical acceleration of train,but it increases the offload factor of train and significantly increases the lateral acceleration of train.The crosswind has a significant effect on increasing the derailment factor,lateral wheel-rail force and offload factor of train.The offload factor of train is the key factor to control the threshold of train speed.The impact of the aerodynamic force of trains’intersection on running safety cannot be ignored.When the extreme values of crosswind wind speed are 15 m$s1,20 m$s1 and 25 m$s1,respectively,the corresponding speed thresholds for safe running of train are 350 km$h1,275 km$h1 and 200 km$h1,respectively.Originality/value–The research can provide a more precise numerical method to study the running safety of high-speed trains under the aerodynamic effect of trains passing each other on bridge in crosswind.

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来源
《铁道科学(英文)》 |2022年第2期|260-272|共13页
作者
Wenhua Guo; Xinmin Hong; Chunxia Chen;
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作者单位

School of Civil Engineering South University;

School of Civil Engineering City University;

Highway Design and Research Institute Provincial Institute of Communications Planning Design and Research;

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原文格式 PDF
正文语种 chi
中图分类基础理论及试验;
关键词
High-speed railway; Trains passing each other; Vehicle-bridge coupling system; CROSSWIND; Speed threshold;

The coupled vibration of train and bridge as high-speed trains meet in crosswind

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