抄録
As the maximum speed of high-speed trains increases in Japan, flow-induced vibration of trains in tunnels has become a subject of discussion. In this paper, we report results of a study on use of modifications of train shapes as a countermeasure for reducing an unsteady aerodynamic force by on-track-tests and a wind tunnel experiment. First, we conduct a statistical analysis of running test data to identify the parts which affect unsteady aerodynamic force. Next, we develop a wind tunnel test to measure unsteady aerodynamic force acting on a train in a tunnel and examine train shapes with a particular emphasis on parts listed by the statistical analysis. The wind tunnel test shows fins under the car body are highly effective to reduce the unsteady aerodynamic force. Finally, we test the fins by a running test and confirm its effectiveness.
