人下颌骨枪弹伤的三维有限元建模与数值分析  

Three-dimensional finite element modeling and numerical analysis on gunshot wound of human mandible

作　　者：鄢兰元[1] 陈渝斌[2] 张纲[1] 缪莹赟[3] 谭颖徽[1] 

机构地区：[1]第三军医大学新桥医院口腔科,重庆400037 [2]第三军医大学大坪医院野战外科研究所口腔科,重庆400042 [3]重庆大学传动实验室,重庆400044

出　　处：《第三军医大学学报》2010年第8期770-772,共3页Journal of Third Military Medical University

基　　金：全军医学科研"十一五"计划(08G083;06Z045)~~

摘　　要：目的利用计算机辅助工程技术,动态仿真不同入射角度子弹侵彻三维下颌骨模型过程。方法对正常志愿者颌面部进行薄层CT扫描,将获得的下颌骨数据以DICOM标准通过Mimics软件进行三维实体重建,在LS-DYNA软件中模拟7.62 mm弹丸以不同入射速度(713.8、1 400 m/s)和不同入射角度(90°、67.5°、45°)致伤下颌骨模型过程。结果建立了形态细致逼真、相似性好的人下颌骨三维有限元模型,成功模拟了人下颌骨弹丸的致伤过程,当7.62 mm弹丸入射角度一致时,入射速度越大,撞击能量越大;当入射速度一致,入射角度为45°组的致伤能量明显高于90°及67.5°组。下颌骨枪弹伤模型出口面积大于入口面积。结论薄层CT、DICOM标准的应用使得有下颌骨限元模型的建立更为精确,利用有限元仿真技术动态模拟人下颌骨弹丸致伤的方法是可行的。Objective To simulate the dynamic procedure of bullet damage to the three-dimensional（3D） finite element（FE） model of mandible from different angle with computer-aided engineering.Methods A mandible was scanned by thin-layer CT,and then CT images were analyzed and managed with Dicom standard and Mimics software.At the same time,a simulation of the 3D FE model penetrated by a 7.62-mm bullet was carried out through LS-DYNA software from different angle.Results A 3D FE model of human mandible was established with highly-identical geometric size,and the dynamic process of bullet damage to the model was successfully simulated.The results of this work indicated that the exit wounds in model tended to be larger than the entrances resulting from the same shot.Conclusion Thin-layer CT and Dicom standard can improve the efficiency of establishment of a more precise 3D FE model of mandible.The procedure of bullet damage to the mandible can be simulated by the finite element.

关 键 词：枪弹伤 有限元 仿真模拟 下颌骨 DICOM 

分 类 号：R318[医药卫生—生物医学工程] R782.4[医药卫生—基础医学]