CAJ | 학술논문

某车型在64 km/h正面40%偏置碰撞试验中，出现踏板和转向管柱的侵入量超标问题。其原因是：更换动力后，前机舱变形空间减小，车体纵梁变形模式不合理，及前围板附近位置的强度较低。为此，该文提出了优化方案：调整纵梁的材料及修改纵梁内加强板的结构，来提高纵梁总成整体结构强度，增加加强件，来提高前围的总体强度。运用Hyperworks及LS-DYNA软件进行仿真分析。结果表明：优化后，改善了纵梁的变形模式，前围板侵入量减小了42 mm；乘员的伤害也得到改善，整体得分提高1分。因此，该优化方案合理，车身结构的加强对乘员起到很好的保护作用。
모차형재64 km/h정면40%편치팽당시험중，출현답판화전향관주적침입량초표문제。기원인시：경환동력후，전궤창변형공간감소，차체종량변형모식불합리，급전위판부근위치적강도교저。위차，해문제출료우화방안：조정종량적재료급수개종량내가강판적결구，래제고종량총성정체결구강도，증가가강건，래제고전위적총체강도。운용Hyperworks급LS-DYNA연건진행방진분석。결과표명：우화후，개선료종량적변형모식，전위판침입량감소료42 mm；승원적상해야득도개선，정체득분제고1분。인차，해우화방안합리，차신결구적가강대승원기도흔호적보호작용。
The reasons were analyzed why steering column deformation and pedal deformation exceeded the standard values in 64km/h positive 40% offset impact. It is because the available space decreases after changing powertrain, with unreasonable vehicle rail deformation mode and low vehicle cowl strength. An optimization scheme was proposed including changing the rail material and modifying the strengthening plate structure of the rail inner to improve the rail assemble strength with strengthening plates added to raise the cowl strength. Hyperworks and LA-DYNA soft wares were used for simulation analysis. The results show that the optimization improves the deformation mode, decreases the cowl invasion by about 42mm, and decreases passenger injuries with the total point increasing by one. Therefore, the structure strengthens occupants' protection. The results show the reasonability of the optimization scheme.