CAJ | 학술논문

针对国内自主品牌轿车在侧碰中常出现车身侧面侵入量较大，导致侧面安全得分较低的现状，对轿车乘员舱刚度的优化与匹配进行了研究。将车身侧面碰撞区域划分为6个分区；通过整车侧面碰撞仿真，并结合正交优化得到了借助改变材料厚度和选用屈服强度高的材料来提高轿车侧面结构抗撞性的方案组合、各分区刚度的匹配和分区刚度与乘员伤害指标的关系。结果表明：整车侧面碰撞6个分区的刚度可明显分为高、低两组，各组的刚度曲线均呈“山峰”状，且组内和组间的刚度都存在一定的关系；优化方案对侧面结构抗撞性的改善最终体现为各刚度曲线同步上升，最后推算出了“峰值”刚度与乘员胸部得分之间的关系。
침대국내자주품패교차재측팽중상출현차신측면침입량교대，도치측면안전득분교저적현상，대교차승원창강도적우화여필배진행료연구。장차신측면팽당구역화분위6개분구；통과정차측면팽당방진，병결합정교우화득도료차조개변재료후도화선용굴복강도고적재료래제고교차측면결구항당성적방안조합、각분구강도적필배화분구강도여승원상해지표적관계。결과표명：정차측면팽당6개분구적강도가명현분위고、저량조，각조적강도곡선균정“산봉”상，차조내화조간적강도도존재일정적관계；우화방안대측면결구항당성적개선최종체현위각강도곡선동보상승，최후추산출료“봉치”강도여승원흉부득분지간적관계。
In view of the current situation that the self-developed cars in China often get low score in side-safety due to the large side intrusion in side-impact, a study on the stiffness optimization and matching of passenger compartment is conducted. The side-impact area of passenger compartment is divided into 6 subareas, and by side-impact simulation combined with orthogonal optimization, some scheme combinations for improving the crashworthi-ness of side structure by changing panel thickness and using high yield strength material, as well as the stiffness matching of each subarea and the relationship between subarea stiffness and occupant injury criteria are obtained. The results show that the stiffness in 6 subareas of car side-impact area can obviously be divided into high and low two groups with the stiffness curve of each group exhibiting a shape of mountain and there exist some relationships in stiffness both within a group and between two groups. The improvement in the crashworthiness of side-structure by optimization schemes is finally reflected in the concurrent rise of stiffness curves, and the relationship between the side-impact score in occupant thorax and the peak stiffness is also reckoned in the end.