Research on numerical simulation of transient pressure for high-speed train passing through the most unfavourable length tunnel

作     者：Zhao Liu Feng Liu Shuanbao Yao Dawei Chen Mingzhi Yang 

作者机构：College of Mechanical EngineeringTaiyuan University of TechnologyTaiyuan 030024China CRRC Qingdao Sifang Co.LtdQingdao 266111China Key Laboratory of Traffic Safety on Track of Ministry of EducationCentral South UniversityChangsha 410075China 

出 版 物：《Transportation Safety and Environment》 (交通安全与环境（英文）)

年 卷 期：2023年第5卷第3期

页      面：78-91页

核心收录：

学科分类：08[工学] 0818[工学-地质资源与地质工程] 082302[工学-交通信息工程及控制] 0701[理学-数学] 0823[工学-交通运输工程] 

基　　金：This work was sponsored by the National Natural Science Foun-dation of China(Grant No.52002265) the China Postdoctoral Science Foundation(Grant No.2022M712930). 

主　　题：transient pressure high-speed train most unfavourable tunnel length 

摘      要：The length of high-speed railway tunnel is an important factor affecting transient pressure of high-speed train.When the tunnel length is the most unfavourable,the transient pressure changes in the tunnel and on the surface of the train are the most severe,which may affect the safe operation of the train or damage the structure in the tunnel.Based on the three-dimensional,compressible,unsteady N-S equation and finite volume method,this paper uses the CFD numerical simulation method to study the change and amplitude distribution of the transient pressure on the train surface and the tunnel when a high-speed train passes through the most unfavourable length tunnel.A fast calculation method is proposed to save the cost of calculation;it has great applicability of pressure amplitude.The results show that the pressure distribution in the tunnel and on the surface of the train is affected by the train speed,the length of the train and the position of the measuring point.The minimum negative peak value in the tunnel appears at the position where the superposition phenomenon is the most severe,and the position will change with the speed of the train.There are two negative peak waveforms of the train surface pressure,and the first waveformn is greatly affected by the train speed.It improves a reference for studying the strength requirement of the most unfavourable length tunnels and trains,and ensures the safe operation of trains in tunnels of different lengths.