Abstract: During the high-speed train surface fluctuation pressure test, the fluctuating pressure measurement method based on sensor array plates is proposed, aimed at eliminating the pressure measurement error which is induced by the interference of the sensor size of itself and the distortion in the pressure tube system. Considering a certain type of CRH high-speed train, establishes a 1 ∶1 model in PRO/E. Starting from hybrid meshes division in ANSYS ICEM and Large Eddy Simulation (LES) used to calculate fluctuating pressure acting on the train surface, the location and quantities of the measuring points in the train surface are obtained. Aforementioned study shows that the fluctuation pressure along the train side has no time correlation in the X-direction. In the line test, the sensor array plates which replace the train surface itself may be of high significance in avoiding the test error caused by the interference of the sensor’s size of itself and the loss in the pressure tube.

Key words: high-speed train, fluctuation pressure, Large Eddy Simulation (LES), array plates