中南大学学报（自然科学版）2018，Vol.49Issue(5)：1297-1305,9.DOI:10.11817/j.issn.1672-7207.2018.05.034
高速铁路挡风墙防风特性风洞试验及优化比选
Anti-wind aerodynamic performance of high-speed train and wind-break wall optimization
摘要
Abstract
When a train runs in strong wind area, the flow field around the train changes dramatically and accidents including derailment and overturning may happen. In order to study the coupling aerodynamic performance between the train model and the wind-break wall, and determine the optimized design parameters of the wind-break wall, wind tunnel tests were carried out to analyze the aerodynamic performance of train and velocity distribution around contact wire in this study. The results show that the lift coefficient, lateral force coefficient and moment coefficients increase with the increase of yaw angle, and the absolute values of them are greatly reduced when the wind-break wall with height of 2.5 m is built. When the wind-break wall height reaches 5.0 m, the protective effect is obvious but weaker than that of the 2.5 m windbreak wall. The dimensionless velocity of the contact wire at height of 5.0 m from the top of rail (TOR) significantly reduces when the wind break wall with height of 2.5 m is built. When the height of the wind-break wall increases to 5.0 m, the dimensionless velocities of both contact wire and messenger wire reduce significantly with the minimum decreasing amplitude of 55%.Therefore, the 5.0 m wind-break wall has better protective effect on the catenary. Considering the safety of the high-speed train and the catenary, and combining the wind-break wall self-strengthening and construction cost, the reasonable height of the wind-break wall is suggested to be 2.5 m high from the TOR.关键词
大风/风洞试验/挡风墙/气动力系数/接触网Key words
strong wind/wind tunnel test/wind-break wall/aerodynamic force coefficient/contact wire分类
交通工程引用本文复制引用
李鲲,梁习锋,杨明智..高速铁路挡风墙防风特性风洞试验及优化比选[J].中南大学学报（自然科学版）,2018,49(5):1297-1305,9.基金项目
铁道部科技研究开发计划项目(2015T002-A) （2015T002-A）
国家自然科学基金资助项目(11372360)(Project(2015T002-A)supported by the Science and Technology Research and Development Funds of Ministry of Railway Station （11372360）
Project(11372360)supported by the National Natural Science Foundation of China) （11372360）
