中南大学学报（自然科学版）Issue(5)：1923-1928,6.DOI:10.11817/j.issn.1672-7207.2015.05.047
高速列车进出隧道口受电弓气动载荷研究
Aerodynamic load on pantograph of high-speed train passing into and out of tunnels
摘要
Abstract
Based on the three-dimensional unsteady compressible N−S equation and the RNGk−εdual equation turbulence model, the influence of tunnel cross-section area and length on aerodynamic load change characteristics on pantograph when a high-speed train passes into and out of tunnel in forward and backward movements was simulated. The results show that the change laws of train surface point pressure obtained by numerical method are in accordance with those by moving model method, and the difference in maximum pressure amplitude is less than 3%. The pantograph head bears alternating pressure load when the high-speed train passes into and out of tunnel, which respectively result in a positive and negative pulse wave shapes in air lift force curves of pantograph head. The forward and backward movements have large effects on air lift force of pantograph head, the positive peak value in forward movement is larger than that in backward movement, and the negative peak value is smaller. With the reduction of tunnel cross-section area, air lift force fluctuation range of pantograph head increases. The effect on air lift force of pantograph head by tunnel length is little when the train passes into the tunnels, while the effect is significant when the train passes out of it.关键词
高速列车/隧道/受电弓/气动抬升力/交变压力Key words
high-speed train/tunnel/pantograph/air lift force/alternating pressure分类
交通工程引用本文复制引用
唐荥,周丹,梁习锋..高速列车进出隧道口受电弓气动载荷研究[J].中南大学学报（自然科学版）,2015,(5):1923-1928,6.基金项目
国家自然科学基金资助项目(51105384)；高速铁路基础研究联合基金重点资助项目(U1134203)@@@@(Project(51105384) supported by the National Natural Science Foundation of China （51105384）
Project(U1134203) supported by the High-speed Rail Joint Fund) （U1134203）
