Assembly deviations of wheelsets cause differential wheelset misalignments and change the wheel-rail contact relationship in railway turnouts. In this paper, the motion conditions of wheelsets under the same bogie are analysed with differential wheelset misalignment based on the mechanical equilibrium condition. A rigid-flexible coupling model of vehicle-turnout dynamic interaction that fully considering different misalignment conditions is established to evaluate the wheel and turnout rails dynamic interaction and vehicle dynamic characteristics. The results show that wheelset misalignment can change wheel load transition position and affect wheel-rail contact conditions, especially when the misalignment direction is toward the switch rail. The larger misalignment angle will increase flange contact range and keep the normal contact stress at a higher level. Both misalignment angle and form determine the wheel-rail vertical force. The lateral force is mainly affected by the superposition effect of the eccentric load and the lateral impact of the wheel load transition.

轮对装配偏差会导致差速器轮对错位，改变铁路道岔的轮轨接触关系。本文在机械平衡条件的基础上，对差动轮对错位情况下的轮对在同一转向架下的运动工况进行了分析。建立充分考虑不同错位情况的车辆-道岔动力相互作用刚柔耦合模型，对车轮与道岔钢轨动力相互作用及车辆动力学特性进行评价。结果表明，轮对错位会改变车轮载荷过渡位置并影响轮轨接触条件，尤其是当错位方向朝向转轨时。较大的不对中角将增加法兰接触范围，并使法向接触应力保持在较高水平。偏角和形状都决定了轮轨垂直力。侧向力主要受偏心载荷的叠加效应和轮载过渡的横向影响。