新型轮轨空间动态耦合模型

The New Wheel/Rail 3-Dimensionally Dynamically Coupling Model

基于车辆 -轨道耦合动力学理论 ,建立了新型轮轨空间动态耦合模型。详细研究了在充分考虑钢轨横向、垂向和扭转振动以及轨道不平顺作用下 ,轮轨空间动态接触几何关系、轮轨法向力以及轮轨蠕滑力的求解模型。突破了传统车辆动力学中关于轮轨刚性接触和始终接触的假设。最后 ,与国际著名软件 NUCARS的数值仿真比较和与我国线路试验的结果比较表明 ,本文所建立的新型轮轨耦合关系模型是正确有效的。

Based on the theory of vehicle track coupling dynamics, the new wheel rail dynamic coupling model is established in three dimension space. On the conditions that the rail lateral, vertical and torsional vibrations, and the track irregularities are considered synthetically, the wheel rail contact geometry, the wheel track normal contact force model, and the wheel/rail tangential creep force are solved in details. In the new model, the assuption that the wheel contacts with the rail rigidly and continuously is broken through. Finally, numerical simulation comparison with software package,NUCARS, and track tests show that the new wheel rail dynamic coupling model is correct and effective valid.