中华医学杂志
中華醫學雜誌
중화의학잡지
National Medical Journal of China
2014年
37期
2919-2922
,共4页
朱震奇%刘辰君%王捷夫%王凯丰%黄志新%王伟达%刘海鹰
硃震奇%劉辰君%王捷伕%王凱豐%黃誌新%王偉達%劉海鷹
주진기%류신군%왕첩부%왕개봉%황지신%왕위체%류해응
腰椎%限定因素分析%人体模型%生物力学
腰椎%限定因素分析%人體模型%生物力學
요추%한정인소분석%인체모형%생물역학
Lumbar vertebrae%Finite element analysis%Manikins model%Biomechanics
目的 建立正常人体全腰椎L1-L5三维有限元模型,并验证其有效性.方法 选取1名健康男性志愿者L1-L5薄层CT扫描图像,利用工具软件Mimics、Geomagic和Ansys,构建全腰椎L1-L5三维有限元模型,设定边界条件、确定单元类型、划分有限元网格并进行加载计算,计算模型在前屈、后伸、(左)侧屈、(右)旋转工况下的平均刚度,与文献结果对照验证模型的有效性.结果 建立了正常人体全腰椎L1-L5三维有限元模型,整个模型共有459 340个单元和661 938个节点.约束模型L5椎体下终板,在L1椎体上终板施加500 kg·m·s-2垂直压缩载荷,并使此载荷均匀分布于表面各节点,随后在L1椎体上终板施加10 kg· m2·s-2前屈、后伸、(左)侧屈和(右)旋转力矩载荷并计算出各方向平均刚度,其结果与其他学者的实验结果相比较为接近.结论 本实验所建立的全腰椎L1-L5三维有限元模型是有效的,可以用于正常模型和手术模型的生物力学模拟和分析.
目的 建立正常人體全腰椎L1-L5三維有限元模型,併驗證其有效性.方法 選取1名健康男性誌願者L1-L5薄層CT掃描圖像,利用工具軟件Mimics、Geomagic和Ansys,構建全腰椎L1-L5三維有限元模型,設定邊界條件、確定單元類型、劃分有限元網格併進行加載計算,計算模型在前屈、後伸、(左)側屈、(右)鏇轉工況下的平均剛度,與文獻結果對照驗證模型的有效性.結果 建立瞭正常人體全腰椎L1-L5三維有限元模型,整箇模型共有459 340箇單元和661 938箇節點.約束模型L5椎體下終闆,在L1椎體上終闆施加500 kg·m·s-2垂直壓縮載荷,併使此載荷均勻分佈于錶麵各節點,隨後在L1椎體上終闆施加10 kg· m2·s-2前屈、後伸、(左)側屈和(右)鏇轉力矩載荷併計算齣各方嚮平均剛度,其結果與其他學者的實驗結果相比較為接近.結論 本實驗所建立的全腰椎L1-L5三維有限元模型是有效的,可以用于正常模型和手術模型的生物力學模擬和分析.
목적 건립정상인체전요추L1-L5삼유유한원모형,병험증기유효성.방법 선취1명건강남성지원자L1-L5박층CT소묘도상,이용공구연건Mimics、Geomagic화Ansys,구건전요추L1-L5삼유유한원모형,설정변계조건、학정단원류형、화분유한원망격병진행가재계산,계산모형재전굴、후신、(좌)측굴、(우)선전공황하적평균강도,여문헌결과대조험증모형적유효성.결과 건립료정상인체전요추L1-L5삼유유한원모형,정개모형공유459 340개단원화661 938개절점.약속모형L5추체하종판,재L1추체상종판시가500 kg·m·s-2수직압축재하,병사차재하균균분포우표면각절점,수후재L1추체상종판시가10 kg· m2·s-2전굴、후신、(좌)측굴화(우)선전력구재하병계산출각방향평균강도,기결과여기타학자적실험결과상비교위접근.결론 본실험소건립적전요추L1-L5삼유유한원모형시유효적,가이용우정상모형화수술모형적생물역학모의화분석.
Objective To create and validate a L1-L5 lumbar three-dimensional finite element model.Methods The L1-L5 lumbar spines of a male healthy volunteer were scanned with computed tomography (CT).And a L1-L5 lumbar three-dimensional finite element model was created with the aid of software packages of Mimics,Geomagic and Ansys.Then border conditions were set,unit type was determined,finite element mesh was divided and a model was established for loading and calculating.Average model stiffness under the conditions of flexion,extension,lateral bending and axial rotation was calculated and compared with the outcomes of former articles for validation.Results A normal human L1-L5 lumbar three-dimensional finite element model was established to include 459 340 elements and 661 938 nodes.After constraining the inferior endplate of L5 vertebral body,500 kg · m · s-2 compressive loading was imposed averagely on the superior endplate of L1 vertebral body.Then 10 kg · m2 · s-2 moment simulating flexion,extension,lateral bending and axial rotation were imposed on the superior endplate of L1 vertebral body.Eventually the average stiffness of all directions was calculated and it was similar to the outcomes of former articles.Conclusion The L1-L5 lumbar three-dimensional finite element model is validated so that it may used with biomechanical simulation and analysis of normal or surgical models.
