颈椎(C_0～C_3)有限元模型的建立及验证  

Construction and Verification of 3D Nonlinear Finite Element Model of Upper Cervical Vertebrae

作　　者：梁凯恒[1] 马迅[1] 关哲[1] 郭媛[2] 赵轶波[1] 常强[1] 牛建鹏[3] 张泓毅[1] 

机构地区：[1]山西医科大学第二临床医学院骨科,山西太原030001 [2]太原理工大学力学研究所,山西太原030024 [3]太原市中心医院骨科,山西太原030001

出　　处：《山西中医学院学报》2009年第1期53-55,共3页Journal of Shanxi College of Traditional Chinese Medicine

摘　　要：目的:建立具有详细解剖结构的上颈椎三维非线性有限元模型并验证其有效性。方法:对1名健康成年男性,以层厚0.6mm进行连续颈部CT扫描得到骨窗断层图像,将CT数据导入到三维重建软件Mimics11.0中得到上颈椎的三维图像数据,再导入ANSYS8.1中生成上颈椎的三维骨性模型。依据文献资料及参考CT结果对上颈椎软组织进行建模,包括椎间盘、小关节和主要韧带结构。最后模拟生理载荷下测定模型各节段(C0～C1,C1～C2,C2～C3)的三维运动范围,并将所得结果与体外生物力学实验结果进行对比,验证所建颈椎有限元模型的有效性。结果:建立了一个较为详尽的上颈椎有限元模型。包括76799个10-node Solid92单元,14670Shell93单元,80个2-node Link10单元,1557个8-node Solid45单元,56个Shell63单元。结论:该模型的生物力学和几何学相似性很好,本实验方法是科学的、精确的。Objective：To construct 3D nonlinear finite element model（FEM） of upper cervical vertebrae and prove the validity of the model. Methods： 3D FEM of upper cervical vertebrae was constructed by means of CT scanning technique to get data of DICOM format,Mimics 11.0 to achieve 3D image data of LIS format,ANSYS 8.1 to make solid model of upper cervical vertebrae.Finally, the range of motion （ROM）of each segment of model was detected under physical load and adjusted according the results of out-of-body biomechanical experiment. Results：A comprehensive, geometrically accurate 3D FEM was established.The model was composed of 76 799 10-node solid 92 elements, 14 670 shell 93 elements, 80 2- node link 10 elements, 1 557 8-node solid 45 elements, 56 shell 63 elements. Conclusions：Biomechanieal similarity and geometrical analogy of the model are quite good, and the method is considered to be scientific and accurate.

关 键 词：颈椎 有限元模型 MIMICS ANSYS 

分 类 号：R681[医药卫生—骨科学]