輪軸蛇行動の非線形分岐解析に基づく車両パラメータ設計手法の検討

抄録

This paper deals with a parameter design for a nonlinear hunting motion of a railway wheelset. If a railway vehicle runs under a critical speed, a hunting motion might occur by an effect of a nonlinearity of a hunting motion. In order to remove a factor for hunting motion under a critical speed, a nonlinear analysis of a hunting motion was carried out. In order to analyze a nonlinear hunting motion, equations of motion with third-order polynomial approximation based on a single axle truck was used. A center manifold theory was applied to the equations of motion and equations of motion of a normal form were derived. An equation of a limit cycle amplitude was obtained using the equations of motion of the normal form. By using the equation of a limit cycle amplitude, a relationship between an amplitude of a limit cycle and vehicle parameters were considered.