基于三維有限元仿真的臥床和空間失重下人體股骨重建分析
發(fā)布時(shí)間：2019-01-03 09:08
【摘要】：進(jìn)行長(zhǎng)期空間飛行的航天員處于失重環(huán)境,所受力學(xué)激勵(lì)小于正常值,會(huì)面臨骨密度減小和骨丟失的問題。為了探究失重環(huán)境下股骨密度和質(zhì)量的變化趨勢(shì),本文建立了人體股骨的三維模型,進(jìn)行了臥床條件下基于有限元的人體股骨重建的仿真分析。通過對(duì)比臥床實(shí)驗(yàn)數(shù)據(jù)與仿真數(shù)據(jù),驗(yàn)證了人體股骨有限元模型與重建參數(shù)的有效性。繼而進(jìn)行人體股骨在空間失重條件下的重建仿真,建立關(guān)于時(shí)間的骨重建速率函數(shù)。增大載荷大小和增加載荷循環(huán)都能減少骨丟失,仿真結(jié)果表明增大載荷大小更能有效減少骨丟失。對(duì)股骨骨量恢復(fù)的重建速率作出討論,結(jié)果表明骨量恢復(fù)的重建速率小于骨丟失的重建速率。本文為航天員阻力鍛煉方法及后期恢復(fù)訓(xùn)練提供了理論依據(jù),航天員在空間飛行期間可以通過增大阻力鍛煉強(qiáng)度減少骨量丟失。
[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.
【作者單位】： 上海交通大學(xué)機(jī)械與動(dòng)力工程學(xué)院;中國航天員訓(xùn)練中心;
【基金】：國家自然科學(xué)基金(51375304) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2011CB711000)
【分類號(hào)】：R85
本文編號(hào)：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.
【作者單位】： 上海交通大學(xué)機(jī)械與動(dòng)力工程學(xué)院;中國航天員訓(xùn)練中心;
【基金】：國家自然科學(xué)基金(51375304) 國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2011CB711000)
【分類號(hào)】：R85
【相似文獻(xiàn)】
相關(guān)碩士學(xué)位論文 前1條
1 雷周激欣;失重環(huán)境下骨重建數(shù)值模擬的理論與方法研究[D];上海交通大學(xué);2015年
，本文編號(hào)：2399176
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