肱骨有限元模型建立及生物力学分析

目的:以成人肱骨为例,将医学图像三维重建技术和有限元方法结合应用于正骨手法研究,建立正常肱骨有限元模型,验证模型的有效性并进行生物力学分析。方法:选择一位青年男性志愿者,对其上肢自尺桡骨上端至肱骨头进行连续断层扫描,得到CT图像,将CT数据导入MIMICS软件中,通过图像分割、三维重建和材料属性赋值,构建正常肱骨有限元模型,利用ANSYS软件进行力学分析,与文献中肱骨的生物力学数据相比较,以此验证模型的有效性。结果:建立了正常肱骨三维几何模型和有限元模型。利用ANSYS软件,对模型进行了有效性验证。所建模型物理特性与真实骨骼相近,能很好地反映骨骼的力学变化,实现手法的定量分析。结论:所建立的肱骨模型外形逼真、在不同载荷下的应力值与相关文献一致,可用作中医仿真系统中的虚拟骨折模型。

Humerus Finite Element Model Establishment and Biomechanics Analysis

ABSTRACT Objective: Adult humerus, for example, the medical image 3 d reconstruction technology is combined with the finite element method is applied in bonesetting skill study, establishing normal humerus finite element model, validate the validity of the model and biomechanics analysis. Methods: Choose a young male volunteer, the upper arm since the foot radius to the humerus head CT scan in a row, CT image, the CT data import MIMICS software, the grid was divided by image segmentation, 3 d reconstruction, and the material attribute assignment, build normal humerus finite element model, using ANSYS software is analyzed with mechanics, and compared with the biomechanics of the humerus in the literature data, in order to verify the validity of the model. Results: Established the normal humerus three-dimensional geometry model and finite element model. By using ANSYS software, the model validation. Subject the model physical properties similar to real bone, can well reflect the bone mechanical change, and realize the methods of quantitative analysis. Conclusion: The established model of humerus lifelike shape, stress under different load values are consistent with the literature, can be used as a virtual fracture model in simulation system of traditional Chinese medicine.