滚翻落地缓冲运动对膝盖冲击力影响建模仿真
发布时间：2018-11-06 15:52
【摘要】：对滚翻落地缓冲运动对膝盖冲击力影响进行准确分析,可以减少运动员受伤的概率。进行力学分析时,需要对膝盖和下肢各关节的受力情况进行分析计算,而传统方法是通过对局部膝关节受力进行计算建立滚翻落地缓冲运动对膝盖冲击力分析模型,未考虑膝盖和下肢各关节的受力情况,导致计算精度低。提出采用下肢分析的滚翻落地缓冲运动对膝盖冲击力影响建模方法,依据人体下肢受力状态建立足部和小腿的受力控制方程,通过方程对踝关节受力和膝关节受力在各平面的分力进行计算,给出膝盖正常状态下的受力模型。在分析滚翻落地缓冲运动下膝盖所受冲击力受力基础上,给出缓冲力作用在左膝盖和右膝盖的冲击力力矩,采用Lagrange动力学方程得到滚翻落地缓冲运动对膝盖冲击力的驱动力矩,完成对滚翻落地缓冲运动下膝盖所受冲击力模型的建立。仿真结果表明,采用所提冲击力分析模型,对膝盖冲击力的受力分析值和理论值更加接近,计算精度较高。
[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.
【作者单位】： 河南农业大学体育学院;
【分类号】：R87;TP391.9
，
本文编号：2314740
[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.
【作者单位】： 河南农业大学体育学院;
【分类号】：R87;TP391.9
，
本文编号：2314740
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