【摘要】：目的構(gòu)建較高仿真度的6歲兒童乘員下肢有限元模型,驗證6歲兒童乘員膝關(guān)節(jié)的有效性;分析在前碰撞載荷下生長板對兒童膝關(guān)節(jié)的生物力學(xué)響應(yīng)及損傷機制。方法基于兒童生理結(jié)構(gòu)及CT影像構(gòu)建包含生長板的6歲兒童乘員下肢有限元模型,賦予相應(yīng)的材料屬性;參照Kerrigan等及Haut等的生物力學(xué)實驗,驗證模型的有效性,分析不同生長板材料屬性對膝關(guān)節(jié)損傷的影響。結(jié)果通過模型仿真實驗與生物力學(xué)實驗曲線對比驗證了模型的有效性;在膝關(guān)節(jié)區(qū)域,生長板的存在可以改變兒童乘員下肢骨折的損傷模式;不同生長板的材料屬性,可以影響股骨軸向損傷力的閾值及達到損傷閾值而發(fā)生骨折的相對位置。結(jié)論所建模型得到有效驗證,可用于6兒童乘員膝關(guān)節(jié)損傷生物力學(xué)響應(yīng)及損傷機制的相關(guān)研究及應(yīng)用。
[Abstract]:Aim to construct a finite element model of lower limbs of 6-year-old child occupants, to verify the effectiveness of the knee joint of 6-year-old children, and to analyze the biomechanical response and injury mechanism of the growth plate to the knee joint of 6-year-old children under front collision load. Methods based on the physiological structure of children and CT images, the finite element model of the lower limbs of 6-year-old children with growth plates was constructed, and the material attributes were assigned to them. According to the biomechanical experiments of Kerrigan et al and Haut et al, the validity of the model was verified and the effects of different material properties of growth plate on knee joint injury were analyzed. Results the validity of the model was verified by comparing the model simulation experiment with the biomechanical experiment curve, and in the knee joint region, the existence of the growth plate could change the injury pattern of the lower limb fracture of the child occupants. The material properties of different growth plates can affect the threshold of axial damage force of femur and the relative position of fracture due to reaching the threshold of injury. Conclusion the model can be used to study the biomechanical response and injury mechanism of knee joint injury of 6 children occupants, and it can be used in the study of biomechanical response and injury mechanism of knee joint injury in 6 children.
【作者單位】： 天津科技大學(xué)損傷生物力學(xué)與車輛安全工程中心;天津市兒童醫(yī)院影像科;
【基金】：國家自然科學(xué)基金項目(81201015,81371360,81471274)
【分類號】：R318.01;U467.14
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本文編號：2466048