Windproof performance of wind barrier on the aerodynamic characteristics of high-speed train running on a simple supported bridge

The light-weight and high-speed of modern high-speed trains make the safety and comfort of trains running on bridges prominent in windy environments. The installation of wind barriers can significantly improve the running performance of high-speed trains by reducing the action of wind on the train body. By using the developed moving model test rig in wind tunnel, this paper analyzed the dynamic interaction of wind barrier on the aerodynamic characteristics of the moving train. The windproof performance of wind barrier with different air porosity is detailed discussed. Influences of train speed, wind velocity and lane position on train's aerodynamic coefficients are quantified according to the test results. The result reveals the difference of train's aerodynamic coefficients between static and moving model tests and found static model test may overestimate the reduction rates of wind barrier on train's aerodynamic coefficients. The decreased train speed and increased wind velocity increase the change values of side and overturning coefficients caused by the wind barrier, while decrease the change of lift coefficient. The wind barrier introduces the opposite law of changes in trains' aerodynamic coefficients with it running at the different lanes, leading to different windproof effect of wind barrier on train's aerodynamic characteristics.

Automated summary

This paper analyzes the effects of wind barriers on the aerodynamic characteristics of high-speed trains using a moving model test rig in a wind tunnel. The results show that wind barriers can significantly improve the running performance of trains by reducing wind action on the train body.