摘要
为更真实地分析大风对列车运行安全的影响,建立列车空气动力学及其对应的系统动力学模型。基于目前高速铁路线路大风监测点风速研究路堤上高速列车的强横风运行安全性。首先针对不同高度的路堤,研究远场气象风速与高速铁路大风监测点风速之间的关系;然后,以大风监测点风速为参考风速,分析不同高度路堤上的高速列车气动载荷系数随侧偏角及路堤高度的变化规律;最后,将气动载荷作为外界载荷施加在系统动力学模型上,分析高速列车在不同高度路堤上的动力学指标变化情况,得到高速列车在不同路况条件下的运行安全域。研究结果表明:线路大风监测点风速近似与远方来流风速成正比,且比例系数随路堤高度增加而增大;当采用线路上大风监测点风速作为参考风速时,高速列车的气动载荷系数和运行安全指标均与路堤高度基本无关,避免了传统方法中采用远场风速作为参考风速而需计算大量不同路堤高度的情况。
In order to analyze the effect of wind speed on the train safety more realistically,the aerodynamic model and multi-body system dynamic model were established,and the operational safety of the high-speed train with strong crosswinds based on the wind speed at the monitoring point was studied.Firstly,the relationship between the distant meteorological wind speed and the wind speed at the monitoring point of the high-speed railway was studied for different heights of embankments.Then,the wind speed at the monitoring point was taken as the reference wind speed,and the variation of aerodynamic load coefficients with yaw angle and embankment height was analyzed.At last,the aerodynamic loads were taken as the external loads to put on the high-speed train system dynamics to analyze the operational safety of the high-speed train on the embankment,and the operational safety domain of the high-speed train on embankments of different heights were given.The results show that the wind speed at the monitoring point is proportional to the meteorological wind speed,and the proportional factor increases with the increase of the embankment height.When the wind speed at the monitoring point is taken as the reference wind speed,the embankment height has little effect on the aerodynamic load coefficients and the operational safety indicators of the high-speed train,which avoids the case of calculating different height embankments when the far field wind speed is taken as the reference wind speed in the traditional method.
作者
龚明
孙守光
李强
刘堂红
GONG Ming;SUN Shouguang;LI Qiang;LIU Tanghong(School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China;CRRC Institute,Beijing 100070,China;Key Laboratory of Traffic Safety on Track of Ministry of Education,School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2018年第8期2099-2106,共8页
Journal of Central South University:Science and Technology
基金
中国铁路总公司科技研究开发计划项目(2015J009-D)
国家重点研发计划项目(2016YBF1200504-F)。
关键词
高速列车
大风监测点
空气动力学
多体系统动力学
运行安全
high-speed train
wind monitoring point
aerodynamics
multi-body system dynamics
operational safety
