Aerodynamic characteristics of moving vehicles of two trains passing each other on bridge under crosswinds

Abstract

Two trains passing each other is controlling factor for the wind-vehicle-bridge systems. To test the aerodynamic characteristics of moving vehicles under crosswinds when two trains are passing each other, a wind tunnel test device, which has two moving tracks, was developed. The rationality of the test result was discussed, the effects of intersection mode, yaw angle and lane spacing on the aerodynamic coefficients of the leeward train were analyzed, and the difference of aerodynamic coefficients between the head vehicle and the tail vehicle was discussed. The results show that the proposed test device has good repeatability. The intersection modes have a certain effect on the aerodynamic force of the leeward train when two trains are passing each other, and the results should be more reasonable during the two trains dynamic passing each other. With the decrease of yaw angle, the sudden change of train aerodynamic coefficients is more obvious. The decrease of lane spacing will increase the sudden change of leeward vehicles. In the process of two trains passing each other, the aerodynamic coefficients of the head vehicle and tail vehicle are significantly different, so the coupling vibration analysis of wind-vehicle-bridge system should be considered separately.

Keywords

two trains passing each other / moving vehicle / wind tunnel test / aerodynamic characteristics / crosswinds

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