Optimization analysis of Bpillar structure based on orthogonal test method
                                                                                    WANG Tao, LI Hang
                               (School of Mechanical Engineering, Anyang Institute of Technology, Anyang 455000, China)

Abstract: Aiming at the vehicle lightweight problem which improved by optimizing the Bcolumn structure, Bpillar structure and materials were optimized. The thickness of the upper and lower plates and the welding line were selected as factors to establish the L9 orthogonal test table. The quality, maximum intrusion and maximum intrusion speed were taken as the targets, and the Bpillar structure optimization design was carried out to obtain the optimal combination that DP780 is 1.5 mm, DP590 is 1.2 mm, and the weld height is 455 mm. The bench analysis of the drop weight test was carried out to compare the crashworthiness and lightweight effect of the Bpillar before and after optimization. The results indicate that the impact resistance of the Bpillar is slightly improved after the optimized design. The intrusion volume, intrusion speed is significantly reduced and bearing capacity is increased. At the same time, lightweight design is reduced by 11%.

Key words: car; bpillar; orthogonal test method; structure