跨坐式单轨车辆的临界侧滚角 任利惠， 季元进

跨坐式单轨车辆的抗倾覆能力显著地受到稳定轮和导向轮与轨道接触状态的影响.当转向架一侧的稳定轮离开轨道梁侧面时，跨坐式单轨车辆的抗倾覆能力将大大降低.建立了跨坐式单轨车辆的侧倾方程，推导了跨坐式单轨车辆柔性系数的计算公式，分析了稳定轮和导向轮与轨道接触状态对浮心高度和柔性系数的影响.提出使用车体临界侧滚角来衡量跨坐式单轨车辆抗倾覆能力的变化.推导了跨坐式单轨车辆的临界侧滚角的计算公式，并使用UM软件动力学仿真验证了上述公式的准确性.依据临界侧滚角讨论了稳定轮预压力合理的设置数值.当稳定轮预压力已设定时，在保证车辆具有良好的抗倾覆能力前提下，应对曲线通过设定最高限速和最低限速.

Critical Roll Angel of Straddling Monorail Vehicle

The anti overturning capacity of straddling monorail vehicle is significantly affected by the contact states of stabilizing wheels and guiding wheels with track beam. When one side stabilizing wheel on bogie leave the side surface of track beam, the anti overturning ability straddling monorail vehicle of will decrease significantly. The overturning equations of straddling monorail vehicle are established and the formula of flexibility coefficient is deduced, and the influence of the contact state between the stabilizing wheels and guiding wheels and the track on the height of buoyancy centre and flexibility coefficient is analyzed. The critical roll angle is proposed to evaluated the change of anti overturning capacity of straddling monorail vehicle, and the formula of critical roll angel is derived and verified by UM software simulation. The reasonable value of pre pressure on stabilizing wheel is discussed according to critical roll angle. When the preload pressure of the stabilizing wheels is determined, the maximum and minimum negotiation speeds at curves should be set to ensure dependable anti overturning capacity of the vehicles.