摘要
乘员骨盆损伤在车辆侧面碰撞中非常常见,研究骨盆在侧碰中的损伤机理,有助于优化汽车保护装置,提高乘员的安全性。本研究根据CT图片提取相关数据,利用逆向工程软件生成骨盆几何模型,用有限元前处理软件划分网格,构建一个中国50百分位女性骨盆的三维有限元模型,并用Guillemot尸体实验结果验证了模型的有效性。然后用该模型进行侧碰仿真模拟,研究骨盆在侧面碰撞中的响应及密质骨厚度对骨盆刚性的影响。结果表明,女性骨盆在侧面碰撞中发生骨折的临界撞击力为3.00 kN;密质骨厚度不同,骨盆受到载荷时的响应也不同,密质骨厚度为1 mm时,前下髂骨脊位移为9.75 mm,密质骨厚度为2 mm时,前下髂骨脊位移为5.35 mm。表明密质骨厚度越薄,骨盆刚性越低。
The pelvis injury is common in side impact.The research of pelvis injury could help to design the vehicle safety devices to improve the safety.A three-dimensional finite element model of a 50th percentile Chinese female pelvic was constructed from CT data,using reverse engineering software and mesh created software.And the effectiveness of the model was validated with the experimental data of Guillemot.This model was then used to analyze the response of pelvis in side impact and the influence on pelvic stiffness of different cortical bone thickness.The results revealed that a fracture load of 3.00 kN was found for the female pelvis in side impact.Different results were calculated from different thickness of cortical bone.When the thickness of cortical bone was 1.0 mm and 2 mm,the displacement of anterior and inferior iliac was 9.75 mm and 5.35 mm,respectively.We conclude that the thinner the cortical bone is,the less stiff the pelvis is.
出处
《中国生物医学工程学报》
CAS
CSCD
北大核心
2011年第3期398-402,共5页
Chinese Journal of Biomedical Engineering
基金
天津市应用基础及前沿技术研究计划项目(10JCYBJC25900)
关键词
骨盆
有限元模型
侧面碰撞响应
密质骨厚度
pelvis
finite element model
side impact response
thickness of cortical bone
作者简介
通讯作者。E—mail：lihaiyan@tust．edu．cn
