本文選題：骨生物力學 + 材料賦值　； 參考：《南京理工大學》2012年碩士論文

【摘要】：隨著數字圖像處理技術的發(fā)展和計算機技術的不斷進步,有限元法作為一種有效的工具廣泛用于骨科生物力學研究中。目前骨骼有限元建模主要是根據骨骼CT圖像灰度值建立幾何和材料賦值,建模過程比較復雜,有限元前處理需要耗費大量時間。本文基于醫(yī)學圖像處理技術和有限元法對個性化長管骨進行有限元仿真研究。本文主要工作包括： (1)利用二維CT斷層圖像和Mimics軟件,實現了人的長管骨三維重建。對比實物,重建的長管骨模型形態(tài)還原性高�；贑T斷層掃描圖像的灰度值構建了個性化長管骨的材料模型,模型的材料與真實分布接近。 (2)應用Abaqus軟件進行長管骨整骨的壓縮力學實驗仿真,獲得了不同材料數目下長管骨有限元模型的仿真結果,進行了有限元仿真結果與實測數據誤差分析,討論了密質骨和松質骨的材料賦值數目對有限元仿真結果影響,確定了長管骨材料合理的有限元材料賦值數目。 (3)針對長管骨骨干的結構特點,結合Mimics軟件中提取幾何信息和材料信息,在Abaqus軟件平臺上進行了參數化建模。通過開發(fā)的插件程序,輸入長管骨的幾何和材料參數,實現了長管骨有限元參數化建模。 (4)對長管骨參數化有限元模型進行壓縮實驗仿真,對比驗證實驗獲得的生物力學數據,驗證了參數化模型有限元仿真結果可靠性。 本次基于個性化長管骨的有限元仿真研究,通過對骨骼材料合理賦值的探討和長管骨的有限元參數化建模研究,進行了個性化長管骨快速有限元分析。此外,骨骼有限元材料合理賦值數目的確定,為今后骨骼仿真研究材料賦值提供參考。
[Abstract]:With the development of digital image processing technology and computer technology, finite element method (FEM) is widely used in orthopedic biomechanics as an effective tool. At present, the finite element modeling of bone is mainly based on the gray value of bone CT image to establish geometric and material assignment, the modeling process is more complex, finite element pre-processing takes a lot of time. Based on medical image processing technology and finite element method, this paper studies the finite element simulation of individualized long tube bone. The main work of this paper is as follows: 1) 3D reconstruction of human long tube bone is realized by using 2D CT tomography and Mimics software. Compared with real objects, the reconstructed long tube bone model had higher morphologic reducibility. Based on the gray value of CT scanning image, the material model of individual long tube bone is constructed. The material of the model is close to the real distribution. (2) Abaqus software is used to simulate the compression mechanics of the whole bone of long tube bone. The simulation results of finite element model of long tube bone with different number of materials are obtained. The error analysis of finite element simulation results and measured data are carried out. The effect of the number of materials assigned to dense bone and cancellous bone on the finite element simulation results is discussed. According to the structural characteristics of long tubular bone, geometric information and material information are extracted from mimics software, and parameterized modeling is carried out on the platform of Abaqus software. Through the developed plug-in program, the geometric and material parameters of the long tube bone are input, and the parameterized modeling of the long tube bone by finite element method is realized. (4) the compression experiment simulation of the long tube bone parameterized finite element model is carried out. The reliability of the finite element simulation results of the parameterized model is verified by comparing the biomechanical data obtained from the experiments. Based on the finite element simulation of individualized long tubular bone, the rapid finite element analysis of individual long tube bone was carried out through the study of reasonable evaluation of bone material and the finite element parameterized modeling of long tube bone. In addition, the determination of reasonable assignment number of bone finite element materials provides a reference for future bone simulation research.
【學位授予單位】：南京理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：R318.01;TB115

【引證文獻】

相關碩士學位論文 前1條

1 劉艷;手槍彈對骨骼復合靶標侵徹作用的數值模擬及力學響應研究[D];南京理工大學;2013年

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本文編號：2019544