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[目的]通过CT扫描腕骨所得到的断层图片资料,经过科学软件mimic10.01、magics9.9和ansys10.0建立头状骨三维模型并进行有限元分析,探讨以不同的精确度下划分网格后模型所产生的变形量之收敛性。[方法]选取一男性,26岁,健康成人的双侧头状骨节段,用螺旋CT机对标本扫描,进行有限元分析。[结果]在以均布力条件下比较10种不同元素收敛性分析,可以得到在精确度从1到5的变化量基本稳定;根据10种不同元素集中力之收敛性比较从1到2得到的变化量基本稳定。有限元分析:从VonMises应力分布图可见头状骨应力分布,头状骨颈部所受的应力较大。[结论]头状骨有限元模型在精确度选取在1到2的情况具有参考价值。
[Objective] To establish the three-dimensional model of cranial bone through scientific software mimic10.01, magics9.9 and ansys10.0 by CT scan of the carpal bone and to carry out finite element analysis. Convergence of the deformation caused by the model. [Methods] Bilateral cranial bone segments of a male, 26-year-old healthy adult were selected. The specimens were scanned with spiral CT and analyzed by finite element method. [Result] When the convergence analysis of 10 different elements was compared under the condition of uniform force, the variation from 1 to 5 in accuracy was basically stable. According to the convergence of 10 different elements from 1 to 2 The amount of change is basically stable. Finite element analysis: From the stress distribution of Von Mises, we can see the distribution of stress in the cephalic bone and the stress on the neck of the cephalic bone is larger. [Conclusion] The finite element model of cephalic bone has reference value when the accuracy is selected from 1 to 2.