Metro Train Derailment Protection Device Scheme

[Objective] Under unpredictable complex conditions such as natural disasters, failures of vehicle/track key components, or external impacts, metro train derailment is still highly prone to occurrence. Therefore, research on train passive derailment protection device schemes is essential. [Method] A dynamics nonlinear simulation model of metro train multi-body system is established. The typical shapes of both the wheel tread and the steel rail are matched. Based on the characteristics of metro train operating routes, three schemes for metro train derailment protection devices are proposed, and the derailment condition for each scheme is simulated under low-speed operating conditions. Regarding the simulation results, the effectiveness of preventing secondary rail climbing/derailment, the strength of the installation position, and the damage to vehicle caused by collision between rail and derailment protection device after derailment are taking into consideration comprehensively, a scheme of installing lateral