An Optimization Method for Height of Nose Rail at Turnout Crossing

Abstract:

In order to improve the dynamic wheel-rail interaction of turnout crossing and reduce damage on the nose rail， an optimization method for the height of the nose rail was proposed based on the wheel-rail contact characteristics. This method aims to reduce the wheel-rail contact forces of turnout crossing as the design goal， to ensure the safety of the vehicle and the monotonicity of the longitudinal height of the nose rail as the constraints. The particle swarm algorithm was used to solve the optimization model， which had a faster convergence speed. The results show that the optimization method can quickly design the height of nose rail that better matches the wing rail according to the rail profile of turnout crossing， the heightening value of the wing rail and the tread profile. Moreover， the optimized nose rail can improve the wheel-rail contact relationship， thereby reducing the wheel-rail impact when the vehicle passing the turnout crossing.