跨坐式单轨车耦合转向架的径向机理及参数影响

建立了跨坐式单轨车辆耦合转向架稳态曲线通过理论模型,推导了耦合转向架的径向调节机理,并推导出径向条件所需耦合参数的计算公式。建立了带有耦合转向架的跨坐式单轨车辆动力学模型,仿真了耦合转向架的曲线通过性能并验证了耦合转向架的径向调节能力,同时分析了耦合参数对耦合转向架径向调节能力及曲线通过性能的影响。研究结果表明:最佳耦合回转刚度仅与车辆结构参数及二系纵向刚度相关,合理选取耦合回转刚度可以使耦合转向架在二系悬挂系统和耦合机构的共同作用下,在圆曲线上自动达到径向位置,此时最大导向轮径向力明显减小,车辆的曲线通过安全性得到显著提高;耦合横向刚度对摇头角稳态值的影响很小,但耦合横向刚度的存在会恶化转向架在缓和曲线上的动力学性能。

Radial Mechanism and Parameter Influence of Coupled Bogie for the Straddling Monorail Vehicle

A theoretical model of steady-state curve negotiation of coupled bogie for straddling monorail vehicle was established, the mechanism of radial adjustment of the coupled bogies was analyzed, and the formula for calculating the coupling parameters required for achieving the radial state was derived. The dynamics model of straddling monorail vehicle equipped with coupled bogies was established, and the curving performance of the coupling bogie was simulated, and the radial adjustment capacity of coupled bogie was verified. Meanwhile, the influence of coupling parameters on the radial adjustment capacity and curving performance of the coupled bogie was also analyzed. The results show that the optimal rotary stiffness is only related to the vehicle structural parameters and the secondary longitudinal stiffness. The reasonable selection of the coupling rotary stiffness can make the coupling bogie automatically reach the radial position on the circular curve under the joint action of the secondary suspension system and the coupling mechanism. At this time, the maximum radial force of guiding wheels is obviously reduced, and the curve passing safety of the vehicle is significantly improved. The coupling lateral stiffness has little effect on the steady value of the yaw angle of the coupled bogie, but it will worsen the dynamic performance of the bogie on the transition curve.