Structure Performance Simulation Research Of The Train Wheelset Based On The Finite Element Analysis Method

With the rapid development of the railway transportation, improving the ability of train braking system for freight has attracted considerable research attention. The wheel wear, hot cracking is considered to be the leading style of failure, which directly affects the safety of train operation.On the basis of the finite element thermal analysis theory, the3-D simulation model for wheelset of train is established in ANSYS, in which the amount of interference and nonlinear properties of material are taken into account. The new model, the limited model and the intermediate time model is created at the same time. According to the thermal analysis of energy conversion guidelines, the brake boundary conditions of thermal load are put forward through the numerical simulation analysis. At the same time, a mathematical model based on the thermal load variable factors of the boundary is built by means of orthogonal design in mathematical statistics.The temperature field of the mathematical model of orthogonal experimental design about emergency-braking or slopes-braking is elaborative analyzed. And then the stress field of two cases mentioned above is computed by sequential coupling method, in which the previous result is used as boundary conditions. The results are compared and the impact causing by factor of orthogonal experimental design is evaluated with the method of variance analysis. Subsequently a typical model affecting the calculation results exceeding is filtered out, whose curves of temperature or stress field changing with time are drawn and surveyed comprehensive as well as.The mathematical model of orthogonal experimental design under mechanical load alone and thermal-mechanical coupling load effects are calculated. The fatigue strength of area in radial plate on wheel is assessed which utilizes the Goodman fatigue limit diagrams and conversion method of ORE altering multiaxial stress state to uniaxial stress state via data refined by ANSYS and program of MATLAB. Finally, the prestress-structure modal is extracted and the type and frequency of the vibration is analyzed. The results are obtained which shows that the vehicle suspension system will not produce resonance phenomenon.