【摘要】：對(duì)滾翻落地緩沖運(yùn)動(dòng)對(duì)膝蓋沖擊力影響進(jìn)行準(zhǔn)確分析,可以減少運(yùn)動(dòng)員受傷的概率。進(jìn)行力學(xué)分析時(shí),需要對(duì)膝蓋和下肢各關(guān)節(jié)的受力情況進(jìn)行分析計(jì)算,而傳統(tǒng)方法是通過(guò)對(duì)局部膝關(guān)節(jié)受力進(jìn)行計(jì)算建立滾翻落地緩沖運(yùn)動(dòng)對(duì)膝蓋沖擊力分析模型,未考慮膝蓋和下肢各關(guān)節(jié)的受力情況,導(dǎo)致計(jì)算精度低。提出采用下肢分析的滾翻落地緩沖運(yùn)動(dòng)對(duì)膝蓋沖擊力影響建模方法,依據(jù)人體下肢受力狀態(tài)建立足部和小腿的受力控制方程,通過(guò)方程對(duì)踝關(guān)節(jié)受力和膝關(guān)節(jié)受力在各平面的分力進(jìn)行計(jì)算,給出膝蓋正常狀態(tài)下的受力模型。在分析滾翻落地緩沖運(yùn)動(dòng)下膝蓋所受沖擊力受力基礎(chǔ)上,給出緩沖力作用在左膝蓋和右膝蓋的沖擊力力矩,采用Lagrange動(dòng)力學(xué)方程得到滾翻落地緩沖運(yùn)動(dòng)對(duì)膝蓋沖擊力的驅(qū)動(dòng)力矩,完成對(duì)滾翻落地緩沖運(yùn)動(dòng)下膝蓋所受沖擊力模型的建立。仿真結(jié)果表明,采用所提沖擊力分析模型,對(duì)膝蓋沖擊力的受力分析值和理論值更加接近,計(jì)算精度較高。
[Abstract]:An accurate analysis of the impact of roll-down cushion motion on knee impact can reduce the probability of injury. When mechanical analysis is carried out, it is necessary to analyze and calculate the stress of each joint of knee and lower extremity, but the traditional method is to establish the analysis model of impact force of knee by rolling and landing cushioning motion by calculating the local knee joint force. The calculation accuracy is low because the stress of knee and lower extremity joints is not considered. This paper presents a modeling method for the impact of kneecap impact by the roll down cushion motion based on the lower extremity analysis, and establishes the force control equations of the foot and the lower leg according to the force state of the lower extremity of the human body. The stress model of knee joint under normal condition is given by calculating the force of ankle joint and the force of knee joint in each plane. Based on the analysis of the impact force on the knee under the roll down cushion motion, the impact force torque acting on the left knee and the right knee is given, and the driving moment of the roll down cushion motion to the knee impact force is obtained by using the Lagrange dynamic equation. Build the impact force model of the knee under the roll-down cushion motion. The simulation results show that with the proposed impact force analysis model, the stress analysis value of knee impact force is closer to the theoretical value, and the accuracy of calculation is higher.
【作者單位】： 河南農(nóng)業(yè)大學(xué)體育學(xué)院;
【分類號(hào)】：R87;TP391.9
，

本文編號(hào)：2314740