A Study Of Curving Dynamics Performance For Tilting Car

By using tilting passenger cars, train can negotiate at a higher speed without reducing the passenger' s ride quality. This is a good method that allows a significant increase in speed at existing track, improves the railway transport capability, and enhances railway' s competition with other transportation. Tilting trains have been applied successfully in several countries in the world. China has also begun to develop tilting trains. Combining with the science and technology development project for the Ministry of Railway, the main work of this thesis is on the studies of curving dynamics of tilting passenger cars.Firstly, the mechanism of increasing curving speed with tilting passenger car and several tilting trains abroad are described briefly. Then analysis the tilting mechanism of the tilting car, and get the parameters for the differential equations of motions for the tilting car. The emphases of this paper are he studies of curving dynamics of tilting passenger cars. A nonlinear mathematics model with 21 degrees of freedom is set up in this thesis. The nonlinear differential equations of motions for the vehicle system have been derived. The nonlinearities in the model include wheel/rail contact geometry, wheel/rail interactive forces and suspension parameters. Forced-steering mechanism of the bogie is also considered in the vehicle model. At last a nonlinear mathematics model of three cars curving negotiation is built, and analysis the influence of the joint device of car end to the dynamics behavior of curving negotiation.By optimizing the parameters of the steering mechanism and suspension system and inter-vehicle, get the range of the parameters.