Analysis and research on strength simulation of an automobile seat

YE Fang1, XU Zhongming2, ZHAI Xicheng3

(1.College of Intelligent Manufacturing and Automobile, Chongqing Technology and Business Institute, Chongqing 400052, China; 2.Department of Mechanical Engineering, Chongqing University, Chongqing 400030, China;3.Chongqing Yucai Vocational Education Center, Chongqing 401520, China)

Abstract: In order to avoid the structural damage of automobile seat and improve the reliability of seat, the method of replacing the side plate material with better yield limit was proposed to improve the safety of seats.The geometry modeling of the main driving seat of a twocompartment car was made with CATIA software,and the finite element model was set up with HYPERMESH software.The validity of the finite element model was validated by comparing the results of downwardpressure stiffness test and simulation analysis.The static strength of seat assembly, backrest and headrest structure were performed through simulation based on GB15083 and GB11550, and the fatigue strength of the seat skeleton assembly was simulated based on QC/T 740.The results indicate that the maximum stress of side plate of seat skeleton exceeds the yield limit of material，the maximum deformation position of seat assembly and backrest meets the requirements of regulations, the fatigue life of seat structure meets the requirements, and the reliability durability meets the design requirements.