基于三维有限元仿真的卧床和空间失重下人体股骨重建分析
发布时间：2019-01-03 09:08
【摘要】：进行长期空间飞行的航天员处于失重环境,所受力学激励小于正常值,会面临骨密度减小和骨丢失的问题。为了探究失重环境下股骨密度和质量的变化趋势,本文建立了人体股骨的三维模型,进行了卧床条件下基于有限元的人体股骨重建的仿真分析。通过对比卧床实验数据与仿真数据,验证了人体股骨有限元模型与重建参数的有效性。继而进行人体股骨在空间失重条件下的重建仿真,建立关于时间的骨重建速率函数。增大载荷大小和增加载荷循环都能减少骨丢失,仿真结果表明增大载荷大小更能有效减少骨丢失。对股骨骨量恢复的重建速率作出讨论,结果表明骨量恢复的重建速率小于骨丢失的重建速率。本文为航天员阻力锻炼方法及后期恢复训练提供了理论依据,航天员在空间飞行期间可以通过增大阻力锻炼强度减少骨量丢失。
[Abstract]:The astronauts carrying out long-term space flight are in weightlessness environment, and the mechanical excitation is less than normal value, so they will face the problem of bone loss and bone loss. In order to investigate the change trend of femur density and mass in weightlessness environment, a three-dimensional model of human femur was established in this paper, and the simulation analysis of human femur reconstruction based on finite element method was carried out under the condition of bed rest. The validity of the finite element model and reconstruction parameters of human femur is verified by comparing the experimental data of bed rest and simulation data. Then the reconstruction simulation of human femur under the condition of space weightlessness was carried out, and the bone reconstruction rate function about time was established. Both increasing the load size and increasing the load cycle can reduce the bone loss. The simulation results show that increasing the load size can reduce the bone loss more effectively. The reconstruction rate of bone mass restoration of femur was discussed. The results showed that the reconstruction rate of bone mass restoration was lower than that of bone loss. This paper provides a theoretical basis for the astronauts' resistance training method and later recovery training. During the space flight, the astronauts can reduce the loss of bone mass by increasing the intensity of resistance training.
【作者单位】： 上海交通大学机械与动力工程学院;中国航天员训练中心;
【基金】：国家自然科学基金(51375304) 国家重点基础研究发展计划(2011CB711000)
【分类号】：R85
本文编号：2399176
[Abstract]:The astronauts carrying out long-term space flight are in weightlessness environment, and the mechanical excitation is less than normal value, so they will face the problem of bone loss and bone loss. In order to investigate the change trend of femur density and mass in weightlessness environment, a three-dimensional model of human femur was established in this paper, and the simulation analysis of human femur reconstruction based on finite element method was carried out under the condition of bed rest. The validity of the finite element model and reconstruction parameters of human femur is verified by comparing the experimental data of bed rest and simulation data. Then the reconstruction simulation of human femur under the condition of space weightlessness was carried out, and the bone reconstruction rate function about time was established. Both increasing the load size and increasing the load cycle can reduce the bone loss. The simulation results show that increasing the load size can reduce the bone loss more effectively. The reconstruction rate of bone mass restoration of femur was discussed. The results showed that the reconstruction rate of bone mass restoration was lower than that of bone loss. This paper provides a theoretical basis for the astronauts' resistance training method and later recovery training. During the space flight, the astronauts can reduce the loss of bone mass by increasing the intensity of resistance training.
【作者单位】： 上海交通大学机械与动力工程学院;中国航天员训练中心;
【基金】：国家自然科学基金(51375304) 国家重点基础研究发展计划(2011CB711000)
【分类号】：R85
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相关硕士学位论文 前1条
1 雷周激欣;失重环境下骨重建数值模拟的理论与方法研究[D];上海交通大学;2015年
，本文编号：2399176
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