CAJ | 학술논문

为优化安全带固定式儿童乘员约束系统(CRS)安全带设计，用“试验设计方法（DOE)”，优化约束路径参数。用CRS有限元模型，建立Hybrid III 3岁儿童假人正面碰撞仿真模型，用台车试验结果进行了验证。改进了CRS骨架结构，用正交试验设计，研究安全带导向环固定位置、骨架座椅厚度及儿童乘员与五点式安全带之间的摩擦因数等因素，对头部伤害指标（HIC15）值、胸部合成加速度、胸部垂直加速度等损伤参数的影响。结果表明：头部前倾位移量，从高于法规限值（550 mm)的1.5%，降到低于限值的15%。安全带导向环固定位置是最为敏感的因素；因此，优化导向环固定位置及降低摩擦因数，可减少头部最大位移量。
위우화안전대고정식인동승원약속계통(CRS)안전대설계，용“시험설계방법（DOE)”，우화약속로경삼수。용CRS유한원모형，건립Hybrid III 3세인동가인정면팽당방진모형，용태차시험결과진행료험증。개진료CRS골가결구，용정교시험설계，연구안전대도향배고정위치、골가좌의후도급인동승원여오점식안전대지간적마찰인수등인소，대두부상해지표（HIC15）치、흉부합성가속도、흉부수직가속도등손상삼수적영향。결과표명：두부전경위이량，종고우법규한치（550 mm)적1.5%，강도저우한치적15%。안전대도향배고정위치시최위민감적인소；인차，우화도향배고정위치급강저마찰인수，가감소두부최대위이량。
A method to optimize the parameters of seatbelt constraint paths was built using a design of experiments (DOE) method to improve the safety performance of a type of seat belt ifxed of the child restraint systems (CRS). A front crash simulation model was set-up using an FE model of CRS and a Hybrid III 3-year old child dummy. The simulation results were veriifed with some sled tests. The inlfuences of the seatbelt guide ring positions, the seat skeleton thickness and the friction coefifcient between child and ifve-point harness on injury parameters, such as head injury criterion (HIC15) values, chest resultant acceleration and chest vertical acceleration, were analyzed after improving CRS framework structure, and by using orthogonal experimental design to select parameters. The results show that the head maximum displacement reduces from 1.5% higher than the regulation threshold to 15% lower than the threshold. The seatbelt guide ring position is the most sensitive factor. Therefore, optimizing the seatbelt guide ring position and reducing the friction coefifcient can reduce the maximum displacement of the head.