A three-dimensional model for coupling dynamics analysis of high speed train-track system *

A three-dimensional dynamic model of a high-speed train coupled with a flexible ballast track was developed and is presented in this paper. In the model, each vehicle was modeled as a 42 degrees of freedom multi-body system, which takes into consideration the nonlinear dynamic characteristics of the suspensions. A detailed inter-vehicle connection model including nonlinear couplers and inter-vehicle dampers, and the linear tight-lock vestibule diaphragm is established to simulate the effect of the end connections of neighboring vehicles on dynamic behavior. The track is modeled as a traditional 3-layer discrete elastic support model. The rails are assumed to be Timoshenko beams supported by discrete sleepers. Each sleeper is treated as an Euler beam and the ballast bed is replaced by equivalent rigid ballast bodies. The reliability of the present model was then validated through a detailed numerical simulation comparison with the commercial software SIMPACK, with the effect of the track flexi- bility on the train/track interaction being analyzed simultaneously. The proposed model was finally applied to investigate the difference between dynamic performances obtained by using the entire-train/track model (TTM) and the single-vehicle/track model (VTM). Several key dynamic performances, including vibration frequency response, ride comfort, curving performance, calculated by the two types of dynamic models are compared and discussed in detail. The numerical results show that there is a significant difference between the dynamic behaviors obtained by VTM and TTM, and that inter-vehicle connections have an important influence on the dynamic behavior of high-speed vehicles.

[1]  V K Garg,et al.  Dynamics of railway vehicle systems , 1984 .

[2]  J. Kalker,et al.  On the rolling contact of two elastic bodies in the presence of dry friction , 1967 .

[3]  Manicka Dhanasekar,et al.  A dynamic model for the vertical interaction of the rail track and wagon system , 2002 .

[4]  Xuesong Jin,et al.  Effect of Disabled Fastening Systems and Ballast on Vehicle Derailment , 2007 .

[5]  J. K. Hedrick,et al.  A Comparison of Alternative Creep Force Models for Rail Vehicle Dynamic Analysis , 1983 .

[6]  Stefano Bruni,et al.  The influence of track modelling options on the simulation of rail vehicle dynamics , 2012 .

[7]  Xiaoyan Lei,et al.  Dynamic response analyses of vehicle and track coupled system on track transition of conventional high speed railway , 2004 .

[8]  Luis Baeza,et al.  A railway track dynamics model based on modal substructuring and a cyclic boundary condition , 2011 .

[9]  Jens C. O. Nielsen,et al.  VERTICAL DYNAMIC INTERACTION BETWEEN TRAIN AND TRACK INFLUENCE OF WHEEL AND TRACK IMPERFECTIONS , 1995 .

[10]  Wanming Zhai,et al.  Fundamentals of vehicle–track coupled dynamics , 2009 .

[11]  Georg Rill,et al.  Numerical methods in vehicle system dynamics: state of the art and current developments , 2011 .

[12]  Xinbiao Xiao,et al.  Effect of tangent track buckle on vehicle derailment , 2011 .

[13]  Zefeng Wen,et al.  Numerical simulation of rail corrugation on a curved track , 2005 .

[14]  Madjid Karimirad.  Dynamic Response Analyses , 2014 .

[15]  Xuesong Jin,et al.  Effects of structure elastic deformations of wheelset and track on creep forces of wheel/rail in rolling contact , 2002 .

[16]  Xuesong Jin,et al.  A study of the derailment mechanism of a high speed train due to an earthquake , 2012 .

[17]  Wanming Zhai,et al.  A New Wheel/Rail Spatially Dynamic Coupling Model and its Verification , 2004 .

[18]  Karl Popp,et al.  Vehicle-Track Dynamics in the Mid-Frequency Range , 1999 .

[19]  Manicka Dhanasekar,et al.  A three-dimensional model for the lateral and vertical dynamics of wagon-track systems , 2003 .

[20]  Mats Berg,et al.  Challenges in simulation of rail vehicle dynamics , 2009 .

[21]  Wanming Zhai,et al.  TWO SIMPLE FAST INTEGRATION METHODS FOR LARGE‐SCALE DYNAMIC PROBLEMS IN ENGINEERING , 1996 .

[22]  Yuanqiang Cai,et al.  Response of railway track system on poroelastic half-space soil medium subjected to a moving train load , 2008 .

[23]  Robert Desmond Fröhling,et al.  Low Frequency Dynamic Vehicle/Track Interaction: Modelling and Simulation , 1998 .

[24]  Li Zhou,et al.  Dynamic analysis of a high-speed train operating on a curved track with failed fasteners , 2013 .

[25]  Yeong-Bin Yang,et al.  DYNAMIC STABILITY OF TRAINS MOVING OVER BRIDGES SHAKEN BY EARTHQUAKES , 2002 .

[26]  Xuesong Jin,et al.  Three-dimensional train–track model for study of rail corrugation , 2006 .

[27]  Wanming Zhai,et al.  Coupling Model of Vertical and Lateral Vehicle/Track Interactions , 1996 .

[28]  Makoto Tanabe,et al.  A Simple and Efficient Numerical Method for Dynamic Interaction Analysis of a High-Speed Train and Railway Structure During an Earthquake , 2008 .

[29]  Klaus Knothe,et al.  Modelling of Railway Track and Vehicle/Track Interaction at High Frequencies , 1993 .

[30]  Johan Oscarsson,et al.  Dynamic Train/Track/Ballast Interaction - Computer Models and Full-Scale Experiments , 1998 .

[31]  Shen-Haw Ju,et al.  Dynamic interaction analysis of trains moving on embankments during earthquakes , 2011 .

[32]  Guido De Roeck,et al.  Dynamic analysis of high speed railway bridge under articulated trains , 2003 .

[33]  Xuesong Jin,et al.  Study on the safety of operating high-speed railway vehicles subjected to crosswinds , 2014 .