The invention relates to a wheel rail adhesion control method and device under a braking large creep working condition. The method comprises the following steps: acquiring vehicle parameters, material characteristic parameters, initial wheel rail temperature parameters and initial water film thickness parameters; the mutual coupling relation between the temperature and the material characteristic parameters is considered, a ZMC model is adopted to calculate the bearing pressure of a wheel-rail solid material, and a simplified N-S equation is adopted to calculate the bearing pressure of a fluid medium material between wheel rails; calculating the sum of the pressure borne by the wheel-rail solid material and the pressure borne by the fluid medium material between the wheel rails, and comparing the sum of the pressure with the train axle load to obtain a comparison result; inputting the friction coefficient of the wheel-rail contact interface into an FASTSIM wheel-rail tangential force calculation model to obtain a wheel-rail adhesion coefficient; and train braking deceleration is calculated. According to the method, the dynamic change process of temperature and material characteristic parameters in the braking process is reflected through double-layer iterative calculation, rapid and accurate calculation of the wheel-rail adhesion coefficient is achieved, and anti-skid control over a train under adhesion braking can be achieved.
本发明涉及一种制动大蠕滑工况下轮轨黏着控制方法及装置;方法包括:获取车辆参数、材料特性参数、初始轮轨温度参数和初始水膜厚度参数;考虑温度和材料特性参数的相互耦合关系,采用ZMC模型计算轮轨固体材料承担压力,采用简化的N‑S方程计算轮轨间流体介质材料承担压力;计算轮轨固体材料承担压力和轮轨间流体介质材料承担压力之和,并将压力之和与列车轴重进行比较,得到比较结果;将轮轨接触界面摩擦系数输入至FASTSIM轮轨切向力计算模型中,得到轮轨黏着系数;计算列车制动减速度。本发明通过双层迭代计算反映制动过程中温度和材料特性参数的动态变化过程,实现轮轨黏着系数的快速与精确计算,能够实现黏着制动下对列车的防滑控制。
Wheel rail adhesion control method and device under braking large creep working condition
一种制动大蠕滑工况下轮轨黏着控制方法及装置
2024-03-26
Patent
Electronic Resource
Chinese
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