【摘要】 首先建立了带有悬空轨枕的铁路轨道数学模型,在此基础上推导了车—轨系统运动方程,其中考虑了轮轨非线性接触力引起的非线性问题,然后利用逐步积分法解方程重点分析了悬空轨枕对轨道各个组成部分动力响应的影响,结果表明如果在悬空部分存在轨道不平顺,会引起很大的轨枕加速度和轮轨接触力更多还原

【Abstract】 A mathematical model of railway track with a section of unsupported sleepers is developed. Based on this model, the equations of motions of train track system involving nonlinearity, due to nonlinear contact forces between wheels and rail, are solved by using direct integration method in time domain to obtain nomerical results. Dynamic responses of track components to the hung section excitations are treated. The results show that high acceleration in sleepers and large wheel rail contact forces occur if there are rail corrugations in the hung section.更多还原