Simulation Research On Low Dynamic Bogie Of Type B Urban Railway Transit Vehicle

With the development of urban rail transit, rail transit gradually become the backbone of the urban traffic, the dynamic performance has been paid more and more attention. Vehicle safety and comfort is the focus of research, which are reflected in the bogie dynamic function, therefore, low dynamic function research of bogie for urban rail transit development is of great significance. Based on the theory of vehicle dynamics, by ADAMS/Rail simulation software, the theoretical analysis and simulation research is carried out around the urban rail transit bogie for low dynamic function.Firstly, use subway vehicle of type B as research object, according to the vehicle system dynamics theory established mathematical model, and deduced vehicles dynamic equation.Secondly, established a vehicle traffic system dynamics model by ADAMS/Rail simulation software. And dynamic performance calculation was done on the dynamic model and computing in considering the orbit of random irregularities turbulence, calculation results show that the vehicle safety, stability and through performance curve accords with requirement, and verify the feasibility of the model. Finally, effects of suspension parameters of vehicle on bogie vertical and lateral dynamic performance are investigated research, the wheel-rail vertical force and lateral force, frame and body vibration acceleration and critical speed etc are mainly considered. Research results mainly include:Reduce the stiffness of the primary could reduce wheel/rail force and bogie and body vibration acceleration and critical speed; The stiffness of the secondary have little effect on frame vibration acceleration, but reduce the stiffness of the secondary could reduce body vibration acceleration; Enlarge the damper of the primary and the secondary could reduce vibration acceleration of bogie and body, and critical speed increased with the damper of the secondary increased; The dcreasement of the unsprung mass and bogie mass could effectively reduce the wheel-rail dynamic function. The optimum suspension parameters are elected in the paper research results, and this provides reference basis of suspension parameters for development of metro low dynamic bogie design in the future. 211 figs,56 tabs,39 refs.