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采用跳深的方法对约 40 cm深沙地的力学传递特性进行实验研究 ,并引入“黑箱”理论进行动力学与动力学数据的对比分析以获得沙地力学传递函数 :力传递函数为 Fd=0 .39Fu1 .1 6 ,冲量传递函数为 Id=0 .88Iu;在此基础上 ,采用录像系统与三维测力台系统实现对沙滩排球扣球起跳阶段的运动学与动力学数据的同步采集 ,揭示其主要动力学特征为沙滩排球扣球起跳的恢复系数小以及其形成的三方面原因 ,以图为沙滩排球的科学化训练提供可靠的理论依据。
By using the method of deep jump, the mechanical transfer characteristics of deep sandy land about 40 cm are studied experimentally, and the black box theory is introduced to compare the dynamic and kinetic data to obtain the mechanical transfer function of sand: the force transfer function is Fd = 0 .39Fu1 .1 6, the impulse transfer function Id = 0.88Iu; on this basis, the use of video systems and three-dimensional dynamometer system to achieve the beach volleyball during the spiking phase of the kinematics and dynamics of synchronous acquisition, Reveals the main dynamic characteristics of the beach volleyball spike take-off recovery factor is small and the formation of three reasons, in order to beach volleyball scientific training to provide a reliable theoretical basis.