Research on Optimization Method of Train Door Auxiliary Lock Based on RecurDyn Software

In view of the problems of unsteady movement and large impact force in the working process of rail transit train door auxiliary lock, the structural dimension of the auxiliary lock was optimized by the AutoDesign function of RecurDyn. The design variables are the diameter of the roller, the rotation radius of the roller and the contact profile of the swing arm cam. Taking the rotation speed of the lock tongue, the acceleration of rotation angle of the lock tongue and the rotation angle of the lock tongue as the constraint conditions, the simulation model is optimized. Both simulation and experiment results show that the contact process between the optimized cam and the locking tongue was smoother, and the bearing capacity has been strengthened.