Model Calculation And Applied Research On Vibration Rection Track

With the risen of high-speed train and rapid development of rail transit, train’s travelling speed has been greatly improved, which will increase the interaction force between its wheel tracks and the excessive wheel track reaction will constitute a huge hidden trouble to traffic safety. This article established series models of track and train, which has important practical significance and theoretical value for researching on the mechanical properties between train and track in the case of high-speed running. Through combining actual engineering, this article has following research work:(1) It established superposed beam model through the study of existing new-type vibration reduction tracks, combining track mechanical model and based on hypothesis. By virtue of Visual Fortran language programming, it researched on the mechanical properties of steel rail as well as sleeper under train’s load reaction and track structure under quasi-static state.(2) Based on the study of vehicle- track dynamic principle, it established vehicle-track coupling dynamic model. According to D’Alembert’s principle, it deduced the oscillation equation of the participating mass in various parts of vehicle system and its track system. As for the solution of wheel tracks’interaction force, its normal force can be acquired through establishing building spatial mechanical model and applying Herz nonlinear elasticity contact theory. By carrying out numerical simulation of track irregularity power spectrum and adopting the method of inverse Fourier transform, the irregularity time-domain sample can be obtained, and then the motivation model of route can also be established. During the solution of large-scale system of nonlinear equations such as vehicle-track coupling dynamics, the numerical integration of New-mark can be used.(3) Simulating the dynamic response of common high-speed train in case of high-speed running by using the compiled vehicle-track coupling dynamic procedure. The analysis of numerical results of process simulation under circumstances of different speeds and vehicle parameters has important significance for researching on train stability and guiding optimizing vehicle parameter.(4) Applied the established track vertical, transverse and longitudinal quasi-static models and vehicle- track coupling dynamic model in urban subways by combining No. 6 line of Beijing metro. When the train is traveling under the speed of 80km/h and on the longitudinal tie track structure, it analyzed the support reaction of steel rail and sleeper; variation of quasi-static displacement of steel rail and sleeper as well as responses of various dynamics under the vehicle-track coupling dynamics procedure simulation. Furthermore, it compared the analogue simulation data with testing data, which further proofed procedure credibility.