Abstract: A simulation analysis on the sliding door keeper of a benchmarking car is conducted with software LSDYNA, and the verification test is performed in accordance with the requirements of GB15086—2013. Then the parametric design of middle guide, hook and rear lock structural layouts are carried out, and the approximate model for the separation distance between the door and frame is built based on optimum Latin hypercube sampling method and RBF neural network model. Finally, a multi-objective optimization for the distances of middle guide, hook and rear lock along vertical direction is completed by using NSGA-II algorithm. The results show that the maximum upper and lower separation distances between sliding door and its frame is 65.42 and 65.99 mm respectively, and the guide wheel does not fall off from guide rail, with the total displacements of both B and C column side loading plates are less than 300 mm, meeting the performance requirements of door keeper according to the national standard.

Key words: sliding door keeper, structure layout, multi-objective optimization