【摘要】 为提高地铁列车车钩的可靠性，降低运行中事故发生概率，以Scharfenberg式车钩为对象，对其进行可靠性分析，判断其中的危险零件。根据联结方程与应力-强度干涉理论得到危险零件在受拉和受压两种极限工况下强度与应力的分布参数；根据实际工况对危险零件进行选材，使其可靠度大于0.999 99;确定其危险部位后，对此部位尺寸进行可靠性设计，以期再次提升其可靠度。通过计算钩体与钩舌在极限工况下的可靠性安全系数，结合稳健设计理论，进行应力与强度的分布参数验证与尺寸修改验证；对可靠性设计方案的应力、变形、振动与疲劳强度进行仿真分析。结果表明，可靠性设计方案在安全性、振动舒适性与寿命等方面均优于现有车钩，为轨道交通装备的可靠性设计提供参考。更多还原

【Abstract】 To improve the reliability of subway train couplers and reduce the probability of accidents during subway operation, a reliability analysis was conducted on Scharfenberg type couplers to identify the hazardous components involved. The strength and stress distribution parameters of the hazardous parts under tension and compression limit conditions are obtained based on the connection equation and stress-strength interference theory. Materials are selected for the hazardous parts based on actual working conditions to ensure their reliability is greater than 0.999 99. After identifying the hazardous area, the reliability design should be carried out on the dimensions of this area in order to further improve its reliability. By calculating the reliability and safety factors of the hook body and the hook tongue under extreme working conditions, combined with robust design theory, the distribution parameters of stress and strength are verified and the size modification is verified. The stress, deformation, vibration and fatigue strength of the reliability design schemes are simulated and analyzed. The results show that the reliability design scheme is superior to existing couplers in terms of safety, vibration comfort and lifespan, providing a reference for the reliability design of rail transit equipment.更多还原