A new method for determining wheel–rail multi-point contact

A new method for wheel–rail multi-point contact is presented in this paper. In this method, the first- and the second-order derivatives of the wheel–rail interpolation distance function and the elastic wheel–rail virtual penetration are used to determine multiple contact points. The method takes account of the yaw angle of the wheelset and allows the identification of all possible points of contact between wheel and rail surfaces with an arbitrary geometry. Static contact geometry calculations are first carried out using the developed method for both new and worn wheel profiles and with a new rail profile. The validity of the method is then verified by simulations of a coupled vehicle and track system dynamics over a small radius curve. The simulation results show that the developed method for multi-point contact is efficient and reliable enough to be implemented online for simulations of vehicle–track system dynamics.

[1]  E. G. Vadillo,et al.  A comprehensive method for the elastic calculation of the two-point wheel–rail contact , 2006 .

[2]  Masato. Abe.  The Dynamics of Vehicles on Roads and on Tracks; proceedings of 12th IAVSD Symposium held in Lyon, France, August 26-30, 1991 , 1988 .

[3]  Gunter Schupp,et al.  Modelling the Contact Between Wheel and Rail Within Multibody System Simulation , 2004 .

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

[5]  João Pombo,et al.  A computational efficient general wheel-rail contact detection method , 2005 .

[6]  Gang Xie,et al.  A method to determine the two-point contact zone and transfer of wheel–rail forces in a turnout , 2010 .

[7]  Jerzy Piotrowski,et al.  A simplified model of wheel/rail contact mechanics for non-Hertzian problems and its application in rail vehicle dynamic simulations , 2008 .

[8]  P. Lugner,et al.  COMPUTER-SIMULATION OF THE DYNAMICAL BEHAVIOR OF A RAILWAY-BOGIE PASSING A SWITCH. , 1994 .

[9]  Wanming Zhai,et al.  Study on lateral dynamic characteristics of vehicle/turnout system , 2005 .

[10]  Jens C. O. Nielsen,et al.  Simulation of dynamic interaction between train and railway turnout , 2006 .

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

[12]  J. P. Pascal,et al.  NEW METHOD FOR REDUCING THE MULTICONTACT WHEEL/RAIL PROBLEM TO ONE EQUIVALENT CONTACT PATCH , 1992 .

[13]  J.-P. Pascal,et al.  About Multi-Hertzian-Contact Hypothesis and Equivalent Conicity in the Case of S1002 and UIC60 Analytical Wheel/Rail Profiles , 1993 .

[14]  J. P. Pascal,et al.  The Available Methods to Calculate the Wheel/Rail Forces in Non Hertzian Contact Patches and Rail Damaging , 1993 .

[15]  Jerzy Piotrowski,et al.  Wheel–rail contact models for vehicle system dynamics including multi-point contact , 2005 .

[16]  John A. Elkins.  PREDICTION OF WHEEL/RAIL INTERACTION: THE STATE-OF-THE-ART , 1992 .

[17]  J B Ayasse,et al.  Determination of the wheel rail contact patch in semi-Hertzian conditions , 2005 .