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本文通过对制动时轮轨接触区内微质点粘着过程动力学研究来说明制动工况下机车车轮与钢轨实现粘着的特点,图示了轮轨接触微质点的相互作用能量以及制动时粘着系数的分布密度;说明接触区拉伸和压缩时微质点内粘着力与其变形模数大小的关系,通过分析轮轨接触区的自由能和结合能来研究轮轨粘着的形成过程,并制定出预测牵引和制动工况下粘着系数的方法。结果表明:制动时的粘看系数大大地小于牵引时的粘着系数。
In this paper, the kinematics of adhesion of micro-particles in the contact area of wheel-rail during braking is used to illustrate the characteristics of locomotive wheel and rail adhesion under braking conditions. The interaction between wheel-rail contact micro- The distribution density of the adhesion coefficient; the relationship between the adhesion force and the modulus of deformation in the micro-particle when the contact zone is stretched and compressed; the formation process of the wheel-rail adhesion is studied by analyzing the free energy and the binding energy of the wheel-rail contact zone; A method to predict the adhesion coefficient under traction and braking conditions. The results show that the viscous coefficient of braking is much smaller than that of traction.