The Numerical Analysis Of The Dynamic Response Of Rallway Vehicie/Track Systems Subjected To Impact Loading

With the rapid development of computers, numerical simulation is being a necessary approach to analyze and solve engineenwproblems. FEM(fmite element method) is being more and more extensively used due to the advantage of convenience, high precision, short cycles and broad suit last years. However, the application of FEM in SCDOV/T(System Coupling Dynamics of Vehicle/Track) is still at its initial stage. To overcome the limitation of the conventional multi-rigid system dynamics in modeling Vehicle/Track systems and calculating their interaction, and to truly present the interaction and intereffect Vehicle/Track systems, Vehicle/Track Coupling System model is built by using FEMB Pre/Post Process code in this paper. The problems are analyzed by using structure nonlinear dynamic response analysis code LS-DYNA3D , the advance techniques of FEM is introduced more extensively and deeply into the other fields of SCDOV/T analysis to solve some difficult problems faced by traditional methods.The dynamic interaction between vehicle and track is one of fundamental problems among railway wheel/rail contact transporting system, it directly constrains the increase of railway running speed and load-carrying. The paper presents the computer simulation on the wheel/rail impact response at a rail joint. The results of the the simulation are compared with that of the experiment, and the model is validated. The valuable data for improving the dynamic performance of SCDOVT is provided..The study in this paper shows that SCDOV/T problems can be processedby using FEM, but FEM has itself advantages over the other conventional methods. It is expected FEM will be employed extensively in the field of SCDOV/T analysis.