人眼晶状体前囊膜的非线性有限元仿真分析  

Study for the Anterior Capsule of Human Crystalline Lens with Nonlinear Finite Element Analysis

作　　者：刘卓[1] 王博亮[2] 戴培山[1] 刘希顺[1] 刘安芝[1] 鞠颖[2] 谢杰镇[2] 黄晓阳[2] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073 [2]厦门大学计算机科学系,厦门361005

出　　处：《生物医学工程研究》2006年第2期79-84,共6页Journal Of Biomedical Engineering Research

基　　金：国家自然科学基金资助项目(60371012);福建省科技重点项目(2002Y021)

摘　　要：在临床试验获得的形态数据和物理数据的基础上,建立了连续环形撕囊后前囊膜的物理模型,利用非线性有限元分析法对撕开口大小与囊膜最大拉伸长度之间的关系进行了仿真计算。结果表明,随撕开口的增大,囊膜所能承受的最大拉伸长度显著增加,最大拉伸状态下的撕开口周长Cr与撕开口初始周长Cc的比值(Cr/Cc)也增大。该结论与实验研究的结论一致,表明前囊膜的可拉伸性能随着撕开口的增大而增大。进一步分析指出,拉伸时,撕开口边缘处外力作用的范围会显著影响最大拉伸长度:外力作用范围越大,囊膜所能承受的最大拉伸长度也就越大;增大幅度随作用范围的增加而减小。研究结果表明,仿真分析取得的结果与实验研究结果相符。Based on experimental data, a nonlinear finite element model of the anterior capsule was constructed to study the relationship between the diameter of continuous circular capsnlorhexis（ccc） and the maximum extend of the anterior capsule by finite element analysis. Calcnlating results showed that the capsule could be extended larger by an external force as the diameter of CCC aperture increasing, This result is accord with the results of experimental studies on lens capsules of human body. Furthermore, simulation indicates that the contact area of the external force has a great influence on the max extend length： giving the same diameter of CCC, the capsule＇s extend length increasing as the contact area of the external force become larger. This result remains undiscovered in experimental studies. The current work demonstrates that simulation analysis is believed to be a promising, powerful tool in the field of biology medical engineering.

关 键 词：前囊膜 撕开口 拉伸长度 非线性有限元 连续环形撕囊 

分 类 号：R318[医药卫生—生物医学工程]