The longitudinal distance between the centre pivot and the centre of end bogie significantly affects the wheelset lateral force of the outer and inner wheelset. Whether the centre pivot of end bogie of articulated train needs to be offset, and how to set the offset distance, research is still lacking. Taking this as a starting point, this study utilised wheelset lateral force factor to discuss the influence of the centre pivot offset distance on the safety of the wheelset lateral force and derived the formula for calculating the critical offset distance of the centre pivot. Taking an articulated tram with three car bodies and four bogies as an example, a force analysis model for steady-state curve negotiation was established, and the relationship between the wheelset lateral force and the offset distance of the centre pivot was derived, which was verified by the dynamic model. When the maximum value of the wheelset lateral force factor of each bogie reached the minimum, the optimal centre pivot offset distance was obtained, which was called the critical offset distance. The influence of the offset states of the centre pivot on the curving performance of the tram was analysed by the dynamic model. The results showed that derailment coefficient, wheelset lateral force factor, and lateral displacement of end car bodies in the critical offset state were smaller than them in other offset states.

中心枢轴和末端转向架中心之间的纵向距离显着影响外轮对和内轮对的轮对横向力。铰接式列车末端转向架的中心枢轴是否需要偏置，偏置距离如何设置，目前尚缺乏研究。以此为出发点，本研究利用轮对侧向力系数，探讨中心支点偏移距离对轮对侧向力安全性的影响，推导出中心支点临界偏移距离的计算公式。以一辆三车体四转向架铰接式有轨电车为例，建立稳态弯道通过力分析模型，推导出轮对侧向力与中心支点偏移距离的关系，动态模型验证了这一点。当每个转向架的轮对侧向力系数的最大值达到最小值时，得到最佳的中心枢轴偏移距离，称为临界偏移距离。通过动力学模型分析了中心枢轴偏移状态对有轨电车转弯性能的影响。结果表明，临界偏移状态下的脱轨系数、轮对侧向力因子和端部车体的横向位移均小于其他偏移状态。通过动力学模型分析了中心枢轴偏移状态对有轨电车转弯性能的影响。结果表明，临界偏移状态下的脱轨系数、轮对侧向力因子和端部车体的横向位移均小于其他偏移状态。通过动力学模型分析了中心枢轴偏移状态对有轨电车转弯性能的影响。结果表明，临界偏移状态下的脱轨系数、轮对侧向力因子和端部车体的横向位移均小于其他偏移状态。