Based on the vehicle front crash finite element analysis, it shows that there is a large acceleration, so it needs further optimization. In order to improve the performance of vehicle collision, eight parts were selec...Based on the vehicle front crash finite element analysis, it shows that there is a large acceleration, so it needs further optimization. In order to improve the performance of vehicle collision, eight parts were selected which have large impact for the result, its thickness as design variables to the right of the B-pillar acceleration peak of optimization goal;17 sample points were selected by Latin hypercube sampling method. Many structure parameters are optimized using sequential quadratic program (SQP) based on the surrogate model. The results show that the improved RSM has high accuracy;the right B-pillar acceleration reduced approximately 22.8%, reached the expected objective and was more conducive to the occupant safety.展开更多
64 km/h 40%正面可变形壁障偏置碰撞是中国新车评价规则(C-NCAP)和欧洲新车评价规则(Euro-NCAP)测试重点考核的项目。为解决某车型在这种碰撞中存在的踏板侵入量严重超标问题,该文使用整车碰撞仿真模型,计算了踏板安装区域的变形程度,...64 km/h 40%正面可变形壁障偏置碰撞是中国新车评价规则(C-NCAP)和欧洲新车评价规则(Euro-NCAP)测试重点考核的项目。为解决某车型在这种碰撞中存在的踏板侵入量严重超标问题,该文使用整车碰撞仿真模型,计算了踏板安装区域的变形程度,分析了机舱纵梁的变形模式,优化了车身结构,增大机舱左纵梁的吸能效果和优化变形模式,加强中央通道区域的强度。仿真验证的结果表明:优化后碰撞中,油门踏板后移量降低了48.5%,上移量降低了29.1%;降低了踏板安装区域结构的变形,降低了踏板侵入量。因此,该优化方案解决了踏板侵入量超标问题,提升了整车安全性能。展开更多
本文旨在研究正面碰撞中座椅参数对乘员保护效果的影响。首先依据某一轿车副驾驶员座椅相关尺寸设计了简化的台车约束系统试验装置,建立了带Hybrid III 50th假人的约束系统有限元仿真模型,并通过台车试验验证了其有效性。接着采用最优...本文旨在研究正面碰撞中座椅参数对乘员保护效果的影响。首先依据某一轿车副驾驶员座椅相关尺寸设计了简化的台车约束系统试验装置,建立了带Hybrid III 50th假人的约束系统有限元仿真模型,并通过台车试验验证了其有效性。接着采用最优拉丁方试验设计和Kriging模型,对座椅前后位置、坐垫高度、坐垫倾角和靠背倾角等4个参数进行了优化。确定了正面碰撞时座椅的最佳参数:座椅从中间位置向后移动111.5mm、坐垫高度56.99mm、坐垫倾角22.76°、靠背倾角29.33°。最后,基于座椅最佳参数再次进行仿真的结果,加权损伤指标降低了15.77%。展开更多
文摘Based on the vehicle front crash finite element analysis, it shows that there is a large acceleration, so it needs further optimization. In order to improve the performance of vehicle collision, eight parts were selected which have large impact for the result, its thickness as design variables to the right of the B-pillar acceleration peak of optimization goal;17 sample points were selected by Latin hypercube sampling method. Many structure parameters are optimized using sequential quadratic program (SQP) based on the surrogate model. The results show that the improved RSM has high accuracy;the right B-pillar acceleration reduced approximately 22.8%, reached the expected objective and was more conducive to the occupant safety.
文摘64 km/h 40%正面可变形壁障偏置碰撞是中国新车评价规则(C-NCAP)和欧洲新车评价规则(Euro-NCAP)测试重点考核的项目。为解决某车型在这种碰撞中存在的踏板侵入量严重超标问题,该文使用整车碰撞仿真模型,计算了踏板安装区域的变形程度,分析了机舱纵梁的变形模式,优化了车身结构,增大机舱左纵梁的吸能效果和优化变形模式,加强中央通道区域的强度。仿真验证的结果表明:优化后碰撞中,油门踏板后移量降低了48.5%,上移量降低了29.1%;降低了踏板安装区域结构的变形,降低了踏板侵入量。因此,该优化方案解决了踏板侵入量超标问题,提升了整车安全性能。
文摘本文旨在研究正面碰撞中座椅参数对乘员保护效果的影响。首先依据某一轿车副驾驶员座椅相关尺寸设计了简化的台车约束系统试验装置,建立了带Hybrid III 50th假人的约束系统有限元仿真模型,并通过台车试验验证了其有效性。接着采用最优拉丁方试验设计和Kriging模型,对座椅前后位置、坐垫高度、坐垫倾角和靠背倾角等4个参数进行了优化。确定了正面碰撞时座椅的最佳参数:座椅从中间位置向后移动111.5mm、坐垫高度56.99mm、坐垫倾角22.76°、靠背倾角29.33°。最后,基于座椅最佳参数再次进行仿真的结果,加权损伤指标降低了15.77%。
