正面冲击作用下SUV副驾驶乘员损伤研究

Injury analysis on co-driver of sport utility vehicle in frontal impact

为降低运动型多功能车(SUV)副驾驶座乘员在正面冲击载荷下的乘员损伤,运用多体软件MADYMO建立某上市运动型多功能车(SUV)正面碰撞副驾驶乘员仿真模型,并运用滑台试验验证模型有效性,基于有效模型,分析安全带预紧方式、限力等级、带扣摩擦力对乘员损伤影响规律。结果表明:安全带双预紧降低乘员胸压量达31.75%;限力等级越高乘员损伤越大;带扣摩擦力增大至3.5 kN,导致肩带力下降320 N,胸部刚度提高至175 kN/m,胸部压缩量降低26.47%,而头部HIC_(36ms)基本不变。因而,安全带双预紧、适当降低安全带限力等级、适当加大带扣摩擦因数有利于降低SUV副驾驶乘员伤害值。

Multi-body software MADYMO was used to establish the simulation model of passenger-side restraint system in frontal impact to improve the protection level of co-driver occupant injuries of sport utility vehicle (SUV) in frontal impact collisions. The simulation results were compared with the experimental databy sliding impact test to verify the validity of the model. Based on the correlated model, the effects of differentpre-tightening forms, different stress levels and the buckle friction force of seat belt on the injury values of theco-driver occupant were studied. Through analysis, safety belt double preloaded reduces the occupant chestcompression to 31.75%. The greater the retractor load limiter value, the greater the occupant injury. The beltbuckle friction force increased to 3.5 kN, leading to decrease the shoulder strap force of safety belt down 320N, increase the chest stiffness to 175 kN / m, and decrease the chest compression by 26.47%, while the head injury criterion HIC36ms essentially invariant. The results show that the safety belt double preloaded, appropriate to reduce the retractor load limiter value, as well as appropriate to increase the coefficient of buckle friction is conducive for reducing co-driver′s injury of SUV in frontal impact collisions.