Wheel-rail Contact Geometry Calculation And Its Impact On The Dynamic Stability

Chinese high-speed railway has entered into the age of high-speed and long mileage. Wheel-rail rolling contact will be a major impact on the stability of the high-speed vehicles. With the actual situation of the high-speed railway, this paper compares several different methods of wheel-rail geometry calculated and studies on the vehicle stability from the wheel-rail contact geometry. In this paper, the following work.(1) Present wheel-rail rolling contact geometry and vehicle stability study at home and abroad the necessity of stability studies.(2) Analyze several different calculation methods of wheel-rail rolling contact and compare the results of their calculations.(3) Review the basic characteristics of sing wheel’s stability and research methods of vehicle linear stability and nonlinear stability; analyze the concept of stability and the high-speed vehicles’snaking movement and its hazards.(4) Define the linear and nonlinear parameters of the wheel-rail rolling contact. Establish a simulated model of single round’s stability, analyze different wheel-rail models’linear critical speed, discuss the stability of the single wheel. And then set up vehicle dynamics model in Adams/Rail, analyze the influence to the vehicle dynamic due to non-linear parameter changes at the same equivalent conicity.