THE LOSS AND REGAIN OF STABILITY DUE TO HUNTING MOVEMENT

The hunting movement of the railway vehicles is a transversal oscillation of the bodies of the system coupled with a rotation around the vertical axis. The causes are the conicity of the wheels and the fact that they are rigidly mounted on the axle (1). This oscillation may occur even on a hypothetic perfect track and endangers the running safety. The model which describes this phenomenon is nonlinear and therefore analytical expressions of the amplitudes may not be obtained. In this paper we deduce an approximate analytical expression of the solution by means of the