【摘要】 本文建立人体的四刚体模型,分析原地跳跃运动。将各关节角取作广义坐标,其中膝关节角作为控制变量,其变化规律根据实际跳跃过程的摄影记录确定。利用动力学方程确定其它关节角及蹬地力的变化规律,并计算离地时刻及相应的腾空高度。根据实际人体参数的数值计算结果可以解释原地跳跃运动的腾空高度与肌肉最大收缩力、爆发动及人体参数之间的关系。更多还原

【Abstract】 A four-segment multibody system is proposed as the model of a human bodyfor the discussion of vertical jumping motion.The joint angles are defined as thegeneralized coordinates,where the knee joint angle is a control variable,which canbe simulated according to the experimental curve of the realistic process of thejumping motion.The variations of other joint angles,the force exerted by theground,the liftoff moment and the maximum jumping height can all be determinedwith the dynamical equations.Using the results of numerical culculations the rela-tionship of the maximum height relative to the maximum contractive ability and theexplosive force of the muscle and the parameters of the human body can be explainedtheoretically.更多还原