It is very complex to calculate the aerodynamic drag of high-speed train running in railway tunnel with multi -shafts. And the difficulty is to calculate the velocity of piston wind.
在高速列车空气阻力计算中，多竖井隧道的列车空气阻力计算比较复杂，其难点在于多竖井的活塞风计算。
The calculated piston wind velocity accords with the measured result on site through making a comparison with tunnel aerodynamic test data of real vehicles.
以实车的隧道空气动力学试验资料为参照进行对比计算，计算活塞风速度与实测结果较好符合。
This paper attempts to establish a calculating formula of piston wind velocity in tunnel with double shafts to solve this problem.
本文试图通过建立双竖井隧道的活塞风计算公式，以解决双竖井隧道空气阻力计算的困难。
This paper attempts to establish a calculating formula of piston wind velocity in tunnel with double shafts to solve this problem.
本文试图通过建立双竖井隧道的活塞风计算公式，以解决双竖井隧道空气阻力计算的困难。
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