The influences of the lateral motion of a single wheelset running on a tangent railway on the creepages and creep forces between wheel and rail are investigated with numerical methods. ...The influences of the lateral motion of a single wheelset running on a tangent railway on the creepages and creep forces between wheel and rail are investigated with numerical methods. The effect of the yaw motion of wheelset is neglected in the analysis, and Kalker’s theory of three dimensional elastic bodies in rolling contact is employed to analyze the creep forces in the wheel/rail rolling contact with Non Hertzian form.展开更多
The effects of structure elastic deformations of wheelset and track on creep forces of wheel and rail are investigated.Finite element method is used to calculate the influence coefficients expressing the relations bet...The effects of structure elastic deformations of wheelset and track on creep forces of wheel and rail are investigated.Finite element method is used to calculate the influence coefficients expressing the relations between structure elastic deformations of wheelset and track and the corresponding loads in the rolling direction and the lateral direction of wheelset,respectively.The influence coefficients of wheelset and track are used to revise some of the influence coefficients obtained with the formula of Bossinesq and Cerruti in Kalker's theory of three dimensional elastic bodies in rolling contact with non Hertzian form.The theory of Kalker and the modified theory of Kalker are respectively employed to analyze creep forces of wheelset and track.The numerical results obtained show a great influence of structure elastic deformations of wheelset and track on the creep forces.Therfore it is not reasonable that wheel and rail are treated as elastic half space in the analysis of wheel and rail in rolling contact,and the present theories of rolling contact based on the assumption of elastic half space need to be further improved展开更多
Through the establishment of the negotiation model ofa single-wheelset, the changed curve of the wheel-rail lateral contact characteristic under different working conditions of track media was simulated and analyzed.T...Through the establishment of the negotiation model ofa single-wheelset, the changed curve of the wheel-rail lateral contact characteristic under different working conditions of track media was simulated and analyzed.The elastic mode of the wheel pair, the transverse elasticity of the track, the stick-slip vibration between the wheel and the track, the negative gradient characteristic of the actual creep force characteristic curve, and the right shift characteristic of the saturation point are considered by Simulink model.This can explain many kinds of creep theory and engineering phenomena and also can provide the support of the theoretical and practical for further research based on creep characteristic curve.展开更多
文摘The influences of the lateral motion of a single wheelset running on a tangent railway on the creepages and creep forces between wheel and rail are investigated with numerical methods. The effect of the yaw motion of wheelset is neglected in the analysis, and Kalker’s theory of three dimensional elastic bodies in rolling contact is employed to analyze the creep forces in the wheel/rail rolling contact with Non Hertzian form.
基金National Natural Science Foundation of China(No.59935100).
文摘The effects of structure elastic deformations of wheelset and track on creep forces of wheel and rail are investigated.Finite element method is used to calculate the influence coefficients expressing the relations between structure elastic deformations of wheelset and track and the corresponding loads in the rolling direction and the lateral direction of wheelset,respectively.The influence coefficients of wheelset and track are used to revise some of the influence coefficients obtained with the formula of Bossinesq and Cerruti in Kalker's theory of three dimensional elastic bodies in rolling contact with non Hertzian form.The theory of Kalker and the modified theory of Kalker are respectively employed to analyze creep forces of wheelset and track.The numerical results obtained show a great influence of structure elastic deformations of wheelset and track on the creep forces.Therfore it is not reasonable that wheel and rail are treated as elastic half space in the analysis of wheel and rail in rolling contact,and the present theories of rolling contact based on the assumption of elastic half space need to be further improved
文摘Through the establishment of the negotiation model ofa single-wheelset, the changed curve of the wheel-rail lateral contact characteristic under different working conditions of track media was simulated and analyzed.The elastic mode of the wheel pair, the transverse elasticity of the track, the stick-slip vibration between the wheel and the track, the negative gradient characteristic of the actual creep force characteristic curve, and the right shift characteristic of the saturation point are considered by Simulink model.This can explain many kinds of creep theory and engineering phenomena and also can provide the support of the theoretical and practical for further research based on creep characteristic curve.
