轮轨中低频相互作用与钢轨波浪形磨耗

On Wheel/Rail Dynamic Interaction in Low and Medium Frequency Range and Rail Corrugation

针对钢轨波浪形磨耗，建立了一个具有弹性轮对与弹性轨道的转向架－轨道系统，在中低频率范围内空间耦合（三维）非线性动力学模型。对典型的钢轨接头冲击下轮轨中低频相互作用模式进行了模拟计算分析。结果表明，轮轨垂向冲击可激起轮轨间横向与纵向的相对振动，从而导致轮轨磨耗数以较高频率变化，使钢轨产生波浪形磨耗。随着运行速度的增加，会激起轮对与轨道系统更高阶振型的振动，使钢轨产生短波的波浪形磨耗。本文的轮轨中低频动力学模型及其计算机程序可用于任意不平顺条件下轮／轨系统中低频范围的相互作用（轮轨垂向、横向与纵向力等）的模拟计算，为深入分析轮轨损伤问题提供了一个有效的手段。

A nonlinear model of space dynamic interaction between wheel and rail in low and medium frequency range incorporating elastic wheelset and elastic track is developed.The patterns of interacting between wheel and rail are simulated under typical rail jiont impact.The results show that the vertical wheel/rail impact can excite space vibration between wheel and rail,which leads to rail corrugation.At high speeds,the irregularities of wheel and rail can give rise to higher frequency vibration of wheelset and track resulting in short pitch wavelength rail corrugation.This model and computer code can be used for the simulation of space dynamic interaction between wheel and rail for all irregularity conditions,thus providing an efficient means for analysing wheel and rail damage problems.