台风环境下移动列车的时变风速参数化研究  

The parametric research for time-varying wind speed of moving train in typhoon

作　　者：胡迎新 张威振 曾世钦 HU Yingxin;ZHANG Weizhen;ZENG Shiqin(Hunan Zhongda Design Institute Co.,Ltd.,Changsha 410075,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]湖南中大设计院有限公司,湖南长沙410075 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2023年第4期1500-1511,共12页Journal of Railway Science and Engineering

基　　金：中南大学-湖南中大设计院有限公司工程建设设计信息化技术研发中心开放课题(KJ-2021-03)。

摘　　要：随着我国东南沿海高铁网络的不断发展与完善,台风等极端天气频繁骚扰路网,对高铁的行车安全构成了巨大威胁,然而,现有基于静止建筑物的台风风场研究无法应用于在桥梁上行驶的列车。为探究桥梁上不同台风和列车运动状态以及台风与列车相对初始位置下移动列车的时变风速情况,并预判台风产生的危害,降低其对列车产生的影响,首先根据各学者提出的风速分布、气压分布以及移行台风风场模型等因素分析确定最合适的台风模型——Jelesnianki(1965)台风风场分布数学模型,推导从不同方向、不同位置驶入台风区的高速列车的时变风速数学表达式,并通过数学表达式逐一改变影响台风与列车运动状态的变量进行参数化分析,研究不同台风运动参数、列车运动参数以及台风与列车初始位置三大类变量对移动列车时变风速的影响规律。分析结果表明:移动列车时变风速和三大类变量下的台风运动方向、台风中心最大风速、台风中心移动速度、台风地理坐标、列车行驶速度、列车行驶方向、列车与台风中心初始距离以及时间等参数相关。其中,台风运动方向、台风中心最大风速、台风中心移动速度以及列车与台风中心初始距离对移动列车时变风速影响最为显著。研究结果可为风-车-桥耦合分析提供参考,并对提高高铁路网安全具有重要意义。With the continuous development and improvement of high-speed rail network in southeast coastal of China,extreme weather such as typhoons frequently harasses the rail network,posing a great threat to the highspeed rail operations.However,the existing typhoon field research based on stationary buildings cannot be applied to moving trains on bridges.To investigate the time-varying wind speed of moving trains on the bridge under different cases and to predict the hazards generated by typhoons and reduce their impact on trains,the most suitable typhoon model,i.e.,Jelesnianki(1965)’s typhoon field distribution mathematical model,was determined based on the analysis of wind speed distribution,pressure distribution and moving typhoon field model proposed by various scholars.Then,the mathematical expression of the time-varying wind speed of high-speed trains coming into the typhoon at different locations or towards different directions was derived.The variables affecting the typhoon and train motion status were changed one by one in the expression to study the influence law on the time-varying wind speed.Such variables include different typhoon motion parameters,train motion parameters,and the initial positions between typhoon and train.The analysis results show that the time-varying wind speed of the moving train is related to the parameters of typhoon motion direction,maximum wind speed at the typhoon center,movement speed at the typhoon center,typhoon geographical coordinates,train velocity,train direction,initial distance between train and typhoon center,and time.Among them,the typhoon motion direction,maximum wind speed at the typhoon center,movement speed at the typhoon center and initial distance between train and typhoon center have the most significant effects on the time-varying wind speed of train.The research results provide a reference for the wind-vehicle-bridge coupling analysis and are significant to improve the safety of high-speed rail networks.

关 键 词：台风风场 时变风速 参数化分析 高速列车 

分 类 号：U270.11[机械工程—车辆工程]