高速模式下地铁隧道空气动力学效应断面优化分析
Optimization of aerodynamic effect section of underground railway tunnel in high-speed modes
摘要：
采用三维数值模拟方法和动网格技术对地铁列车以高速通过不同断面地铁隧道时的空气动力学效应进行了分析，得到了车体表面的压力变化情况，由车外压力换算得到了车内压力。参考美国地铁压力舒适度标准选取了最优断面；针对单体隧道和普通区间隧道2种情况，给出了时速100～140 km/h时不同动态密封指数下，B型和A型地铁列车的隧道空气动力学效应断面优化取值，可供城市高速地铁隧道设计参考。
Abstract：
Adopting three-dimensional numerical simulation method and dynamic mesh technique, analyses the aerodynamic effect when a train passes through different underground railway tunnel sections at high speed, obtains the pressure changes of the train surface, and acquires the inside pressure of the train from the outside pressure. Chooses the optimal section by referring the pressure comfort codes of US underground railway. Analyses the optimal aerodynamic effect section of B-type and A-type trains with different airtight indexes at the train speeds within 100 to 140 km/h, under the conditions of single hole tunnel and ordinary interval tunnel respectively, providing references for the design of high-speed underground railway tunnel.
Keywords:undergroundrailwaytunnel,aerodynamiceffect,section,airtightindex,numericalsimulation