Abstract
It requires calculating the contact point between wheel and rail to analyze the behavior of railway vehicle. However the definitive method of a contact point suitable for practical use has not been established completely, because the forms of wheel and rail are complicated. This paper shows the concrete solving method for the contact point between the arbitrary form of wheel tread and of rail top, based on the theory of kinematics. Furthermore, the solving method for the contact information on the two-point contact that takes place under the particular combination of wheel and rail is also shown. This method is a useful for calculating the position of contact point.
