Abstract
There have been about thirty wind-induced accidents of train have been occurred in Japan since railways were opened. To investigate aerodynamic characteristics of a train under a natural wind, a full-scale model test was performed, and wind velocities and aerodynamic forces on the vehicle models were measured. The values of aerodynamic coefficients calculated from these data were scattered widely but, the causes of scattering have not been clear. In this study, we discussed the influence of wind fluctuation on the scattering of side force coefficients. Both wind fluctuation and side force fluctuation are modeled using a statistical model, and then side force coefficient is evaluated by these fluctuation models. Comparing with experimental results, we found that side force coefficients from these models are in good agreement with experimental ones.
