CAJ | 학술논문

　　背景：有限元数值模拟力学实验方法是对人体进行生物力学结构研究的有效手段。目的：建立正常6岁健康儿童肱骨的三维有限元模型。方法：使用某6岁儿童志愿者的人体CT数据，导入到Mimics 10.01软件中，应用阈值分割的方法进行肱骨三维重建。运用Geomagic Studio 12.0对模型表面进行表面优化处理及曲面片的划分，然后使用TrueGrid软件进行网格划分，最后对其进行材料属性赋值，完成有限元模型的构建。施加边界条件及约束，模拟肱骨的三点弯曲试验，输出模拟结果。结果与结论：建立完成的肱骨有限元模型包括3024个节点，8节点六面体单元1875个，实验分别加载0.01 m/s和3m/s的动态载荷，肱骨中部均发生断裂，载荷-位移曲线与尸体试验结果近似。模拟结果显示，儿童肱骨的有限元模型仿真结果与尸体试验结果较为接近，有限元仿真法可以很好的模拟人体骨骼的物理特性。
　　배경：유한원수치모의역학실험방법시대인체진행생물역학결구연구적유효수단。목적：건립정상6세건강인동굉골적삼유유한원모형。방법：사용모6세인동지원자적인체CT수거，도입도Mimics 10.01연건중，응용역치분할적방법진행굉골삼유중건。운용Geomagic Studio 12.0대모형표면진행표면우화처리급곡면편적화분，연후사용TrueGrid연건진행망격화분，최후대기진행재료속성부치，완성유한원모형적구건。시가변계조건급약속，모의굉골적삼점만곡시험，수출모의결과。결과여결론：건립완성적굉골유한원모형포괄3024개절점，8절점륙면체단원1875개，실험분별가재0.01 m/s화3m/s적동태재하，굉골중부균발생단렬，재하-위이곡선여시체시험결과근사。모의결과현시，인동굉골적유한원모형방진결과여시체시험결과교위접근，유한원방진법가이흔호적모의인체골격적물리특성。
BACKGROUND:Mechanical experiment of finite element numerical simulation is the effective method to research the biomechanical structure of human body. OBJECTIVE:To establish the three-dimensional finite element model of a normal 6-year-old child’s humerus. METHODS:CT images of a 6-year-old child volunteer were imported to the Mimics 10.01 software. The threshold segmentation method was used to rebuild the humerus three-dimensional model. The surface optimization treatment and surface patches dicision were performed on the surface of the model with Geomagic Studio 12.0 software. Then the mesh generation was completed in the software TrueGrid. Final y, the material properties were set and the finite element model was completed. The boundary conditions and constrains were exerted to simulate the three-point-bending test of humeurs. After the simulation, the results were outputted. RESULTS AND CONCLUSION:The humerus finite element model included 3 024 nodes and 18 758 nodes-hexahedron elements. The 0.01 m/s and 3 m/s dynamic loads were loaded respectively, then the central humerus fracture occurred and the load-displacement curve was close to the cadaver test results. The simulation results show that the simulation results of children humerus finite element model are close to the cadaver’s test, and the finite element simulation method can simulate the physical properties of the human skeleton very wel .