摘要
为了在汽车碰撞测试中获得较高的分值,需要对乘员约束系统进行参数筛选与优化设计。初步挑选出对乘员约束系统影响较大的7个参数,然后由WIC加权法则、一阶响应面法结合7因素2水平的正交试验设计筛选出4个优化设计参数即排气孔面积A、限力值L、安全带延伸率B和预紧力N。再采用4因素5水平的正交试验优化这4个设计参数,因正交试验不是全面试验,对试验结果采取直接观察找出的组合不能完全保证就是最优组合,所以需要进行极差分析和方差分析。由极差分析法和方差分析法综合权衡后选择最优组合A5L1B1N5,比较了优化前后的假人x向胸部减速度等图形曲线,结果表明:WIC和HIC等主要伤害指标值得到下降,同时胸部x向减速度峰值与设计计算的峰值接近;优化后的乘员约束系统性能得到了明显的改善。
In order to obtain better scores in car crash tests, an occupant restraint system needs parameter selection and optimization design. Here, seven initial parameters which have greater influence on an occupant restraint system are chosen. Then four optimization design parameters, namely vent area A, load limit L, seat belt extension ratio B, and pretension force N, are selected by the weighted injury criteria （WIC） rule, the first-order response surface method, and the orthogonal test design of seven factors and two levels. The four parameters are optimized using an orthogonal test design of four factors and five levels. Because the orthogonal test is partly done, direct observation of the test results shows the combination cannot fully guarantee an optimal combination, it needs to do range analysis and variance analysis. The optimal combination A5L1B1N5 is chosen comprehensively by range analysis and variance analysis. Comparing some graphics curves, including dummy chest deceleration （ x ） , before and after optimization, shows that the main harm index values such as WIC and HIC decrease. At the same time, the dummy chest deceleration（ x ） peak value approaches the peak value of the design calculation. The optimized performance of the occupant restraint system is obviously improved.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2015年第12期1565-1570,共6页
Journal of Harbin Engineering University
基金
国家科技支撑计划资助项目(2011BAG02B02)
关键词
正面碰撞
乘员约束系统
正交试验设计
参数筛选
优化设计
full frontal impact
occupant restraint system
orthogonal experimental design
parameters selection
optimization design
