CAJ | 학술논문

在某次整车正面偏置碰撞试验中发现，根据中国新车评价规程(C-NCAP)的评分规则，膝盖滑动位移超标，得分较低。为改进相关部件的结构，根据实际的试验状态，建立约束系统模型，用多刚体与有限元分析相结合的方法，仿真分析仪表板造型、结构强度以及约束系统；确定了一种仪表板面板和杂物箱面板的结构优化方案；并进行了试验验证。结果表明：和原方案比较，该方案的膝盖滑动位移由12.7 mm降低到6.5 mm，膝部得分提高2.76分。因此，该研究方法可用于结构优化，缩短产品开发时间。
재모차정차정면편치팽당시험중발현，근거중국신차평개규정(C-NCAP)적평분규칙，슬개활동위이초표，득분교저。위개진상관부건적결구，근거실제적시험상태，건립약속계통모형，용다강체여유한원분석상결합적방법，방진분석의표판조형、결구강도이급약속계통；학정료일충의표판면판화잡물상면판적결구우화방안；병진행료시험험증。결과표명：화원방안비교，해방안적슬개활동위이유12.7 mm강저도6.5 mm，슬부득분제고2.76분。인차，해연구방법가용우결구우화，축단산품개발시간。
In an offset deformable barrier crash, it was found that the knee slider displacement was beyond target and the score was lower than the expected one according to the assessment method by the China New Car Assessment Program (C-NCAP). To solve the problem, some relevant structures were improved by the authors. A multi-body model combined with the ifnite element method was built based on the vehicle test data to simulate the cases of the instrument panel (IP) shape, the structure strength, and the supplemental restraint system (SRS) to ascertain the improving direction. The optimized design of the dashboard and gloves box body was veriifed by tests. The results show that the knee slider displacement reduces from 12.7mm to 6.5mm with the femur score increasing 2.76 points. Therefore, the method can be used to optimize vehicle structures and shorten the product development period.