侧柱碰撞中头部运动学特征对弥散性脑损伤的影响  

Effects of head kinematic characteristics on diffuse brain injury in side pole impact

作　　者：易文韬 唐颖 雷飞兵 曾董 蔡娅妮 罗斌尹 YI Wentao;TANG Ying;LEI Feibing;ZENG Dong;CAI Yani;LUO Binyin(BYD Automotive Industry Company Limited,Automotive Engineering Research Institute,Shenzhen 518000,China;University of Science and Technology of China,School of Engineering Science,Hefei 230027,China)

机构地区：[1]比亚迪汽车工业有限公司,汽车工程研究院,深圳518000 [2]中国科学技术大学工程科学学院,合肥230027

出　　处：《汽车安全与节能学报》2025年第1期66-76,共11页Journal of Automotive Safety and Energy

摘　　要：为完善相关脑损伤评估准则,探究了侧柱碰撞中头部运动学特征对弥散性脑损伤的影响。通过构建一种规定运动边界的六自由度头部模型,探究了60组侧柱碰撞试验中乘员头部运动学及生物力学响应,评估了现有脑损伤指标对弥散性损伤的预测效果。结果表明:不满足“弥散性轴索多轴一般评估”(DAMAGE)和“脑损伤准则”(BrIC)高性能阈值的试验占比分别为27%和35%。“通用脑损伤准则”(UBrIC)对95百分位最大主应变的决定系数R2为0.85,显著高于其他指标。多轴旋转载荷耦合作用导致脑组织应变集中,增加了侧柱工况弥散性脑损伤风险。UBrIC相对其他指标在侧柱工况下更能准确评估弥散性脑损伤风险。A six-degree-of-freedom head model was constructed with prescribed boundary conditions to investigate the impact of head kinematic characteristics on diffuse brain injuries in pole side impacts to refine related brain injury assessment criteria.This study examined the kinematic and biomechanical responses of occupants in 60 pole side impact tests and evaluated the predictive efficacy of existing brain injury metrics for diffuse injuries.The results show that 27%and 35%of the test groups fail to meet the high-performance thresholds for the DAMAGE(Diffuse Axonal Multi-Axis General Evaluation)and for the BrIC(Brain Injury Criteria),respectively.The UBrIC(Universal Brain Injury Criteria)metric shows the coefficient of determination R²of 0.85 for the 95th percent maximum principal strain,significantly higher than other metrics.The coupling effect of Multi-axis rotational loads leads to concentrated brain tissue strain,posing a high risk for diffuse brain injuries in the pole side impact.The UBrIC is more accurate than that of other metrics in assessing this risk.

关 键 词：汽车安全 侧柱碰撞 弥散性脑损伤 损伤指标 数字人体模型 

分 类 号：U461.91[机械工程—车辆工程]