Study of Transverse Stability of High-Speed Rolling Stock at Tunnel Exit

Abstract

Purpose: Numerical simulation of aerodynamic interaction of a moving high-speed train with a wind load applied to the side surface of the train body elements during its exit from the tunnel to the open space is considered. The stability of the rolling stock was assessed according to the criterion of the minimum pressure of the weight load on the wheel. Methods: CFD modeling allows you to significantly expand the amount of information about the interaction of rolling stock with incoming air flow in various environmental conditions. Results: During numerical modeling, the pressure values on the surface of the housing elements of the composition in the overpressure zones and the underpressure zones were obtained. Besides, areas of application of these loads on car surface are defined. Practical significance: It was established that in case of exceeding the speed of air masses by 20% higher than the maximum recorded on the terrain of the northeastern plateau of the right bank of Angren in the prevailing wind direction, an unacceptable decrease in the weight load on the front trolley on the left wheel is possible.