针对可逆约束系统中可逆预紧式安全带与安全气囊优化匹配的问题,建立某车型驾驶员侧约束系统仿真模型,分别对碰撞前自动紧急制动作用下乘员动态响应,以及碰撞中乘员损伤指标进行验证分析。将试验设计,Kriging代理模型以及第二代多目标遗传算法相结合,以可逆约束系统6个关键参数为输入变量,以乘员头、胸、颈、大腿的损伤值为优化目标,开展多目标优化研究,并利用加权损伤指标(Weighted injury criteria,WIC)评价最优匹配方案。结果表明：与优化前相比较,优化后的约束系统能够有效降低乘员损伤值。当碰撞初速度为56 km/h时,最优匹配方案使胸部、颈部、大腿损伤值分别降低6.61%、28.99%、16.12%,WIC值降低4.99%,头部损伤值基本没有变化;将碰撞初速度增大至64 km/h后,最优匹配方案表现出更好的保护效果,乘员头部、胸部、颈部、大腿损伤值分别降低26.19%、33.21%、20.49%、6.11%,WIC值降低28.01%。
For the optimizations of combined effort between reversible pretension seatbelt (RPS) and airbag in reversible restraint systems(RRS). A simulation model of driver-side restraint systems from certain sedan is developed. And the model is validated about the dynamic response of occupant with regard to autonomous emergency braking (AEB) during pre-crash phase, as well as the injury outcomes within in-crash phase. On the basis of six key parameters of RRS are described as input variables, as well as four injury outcomes of head, thorax, neck, femur are described as objects. A comprehensive method involving design of experiments (DOE), Kriging model, and multi-object genetic algorithm II (MOGA II) is conducted to perform a multi-object optimization, and weighted injury criterion (WIC) is used to determine the optimum solution. The result has shown that the optimum solution of RRS improved occupant injury outcomes in both two frontal impact conditions compared to pre-optimized solution. In the condition of impact velocity is 56 km/h, optimum solution of RRS decreases the injury outcomes of thorax, neck and femur by the percent of 6.61%, 28.99%, 16.12% respectively, as well as 4.99% to WIC, but the injury outcome of head remains the same nearly. Nevertheless, the optimum solution of RRS provided better protection for occupant in the condition of impact velocity increased to 64 km/h, the decreased percent are 26.19%, 33.21%, 20.49%, 6.11% to head, thorax, neck and femur respectively, and 28.01% to WIC.
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