Influence of crosswind on the flow induced vibration profile of high-speed train’s windshield

Abstract

The high-speed train’s windshield structure is made of high strength rubber. The stagnation pressure under crosswind condition will lead to a large average deformation along with moderate flow-induced vibration of the windshield structure. This deformation and vibration have a vital influence on the servicing life and failure model windshield structures. In this study, the flow-induced deformation and vibration of windshields under crosswind condition are systematically analyzed through an experimentally verified numerical approach. The flow field and aerodynamic load around windshield structure, as well as the deformation of windshield structure are systematically investigated. The results indicate that, compared to the flat ground windless condition, the windshield’s maximum deformation location under crosswind has shifted from the upper half to the lower half. Besides, among all windshield structures throughout the three car formation train, the downstream half of windward windshield between head car and middle car exhibits the largest deformation. When the wind angle shifts from 20° to 30°, the primary frequency of this maximum displacement location is around 30 Hz. In contrast, the primary frequency on the maximum displacement location of windward windshields between middle car and trailing car is 17.5 Hz.