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| Experimental Research on the Coupling Aerodynamic Response of High-speed Trains Passing through Wind-break Wall |
| LI Kun1, TIAN Hong-qi1, MENG Xiang-lian2, YANG Ming-zhi1 |
| （1. Central South University, Changsha, Hunan 410075, China; 2.China Railway First Survey and Design Institute Group Ltd, Xi′an, Shaanxi 710043, China） |
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Abstract Abstract：Research purposes： The aerodynamic response coupling between wind wall and high speed train will affect the running safety and comfort, when a train passes or two trains run each other by wind wall. The coupling aerodynamic response experiments were carried out by adopting the high speed train aerodynamic performance moving model rig in this paper. Then the pressure wave on the surface of wind wall and train, and its propagation law are gotten and analyzed. Research conclusions： (1) The maximum, the minimum and amplitude of the pressure wave for the measuring points on the inside and outside surface of the wind wall change little when a train passes by the wind wall, and the absolute values of above data are the largest when two trains run each other at middle the wind wall. (2) For the pressure on the inside and outside surface of the wind wall, the amplitude of the pressure wave on the outside surface of the wind wall is far less than that on the inside surface, and these values are proportional to the square of the speed approximately. (3) The pressure on the inside surface of wind wall decreases with the measuring point height increasing, and the pressure on the outside surface of wind wall increases with the measuring point height increasing. Therefore, the pressure change inside surface of the wall should be mainly taken into account when the wind wall structure design calculation is carried out. (4) The research results can provide the basis for the high speed train running safety and wind resistance engineering calculation and design.
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Received: 13 July 2017
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2017, Vol. 34 
