摘要
随着高速列车运行速度的增加,受电弓的气动特性对列车制约作用增大且对列车运行安全的影响显著增加。为进一步改善受电弓的气动特性,文章建立了受电弓气动载荷二维等效模型、包含3辆编组高速列车的受电弓组合模型及碳滑板表面4种波纹位置的受电弓组合模型,采用数值模拟方法,获得了时速350 km工况下受电弓的气动流场及其所受气动力,对比分析了碳滑板表面4种波纹位置和不同速度下受电弓部件的气动力特性。结果表明,随着列车运行速度的增加,含有波纹结构受电弓组合模型的气动阻力小于无波纹模型的气动阻力的趋势愈发明显。波纹朝前受电弓模型的气动阻力最小,减小约9.3%,受电弓前碳滑板波纹朝前时对应气流的扰动程度降低。
With the increase of high-speed train running speed,the aerodynamic characteristics of pantograph place more constraint on trains and have a significant impact on the operation safety.In order to further improve the aerodynamic characteristics,the paper establishes a two-dimensional equivalent model of pantograph aerodynamic load,including a combined model of pantograph of 3-car high-speed trains and a combined model of pantograph with four corrugated positions on the surface of carbon contact strips.The aerodynamic flow field and aerodynamic force acting on the pantograph at 350 km/h are obtained by numerical simulation method,and the aerodynamic characteristics of pantograph components at four corrugated positions on the surface of carbon contact strips and under different speeds are compared and analyzed.The results show that with the increase of train speed,the aerodynamic drag force of the combined pantograph model with corrugated structure tends to be less than that of the model without corrugated structure.The pantograph model with corrugation facing forward has the smallest aerodynamic drag force,reducing by about 9.3%.When the corrugation of the front carbon contact strip faces forward,the disturbance degree of the corresponding airflow decreases.
作者
安睿
任尊松
陈厚嫦
魏雪
吴养民
AN Rui;REN Zunsong;CHEN Houchang;WEI Xue;WU Yangmin(School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing 100044,China;China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China)
出处
《铁道车辆》
2023年第5期51-61,共11页
Rolling Stock
基金
中国国家铁路集团有限公司科技研究开发计划(P2020J025)
中央高校基本科研业务费(2022JBXT004)。
关键词
高速列车
受电弓
表面波纹
气动特性
速度
high-speed train
pantograph
surface corrugation
aerodynamic characteristics
speed
