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A mechanical study on tennis racquets to investigate design factors that contribute to reduced stress and improved vibrational dampening

机译：网球场地的机械研究调查减少应力和改善振动衰减的设计因素

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There are a multitude of factors that will affect the mechanical performance and stress transfer to a tennis player's upper extremities. Variations in frame design, materials, string tensioning, ball stiffness, impact locations, and player technique are just some of the potential variables that can result in a significant increase or decrease of stress transfer and vibration from the racquet to the player. To better understand the significant contributing design factors that influence shock and vibration transmission to the racquet handle upon impact, such testing was conducted in a standardized and repeatable manner to evaluate and compare the shock and vibration patterns for multiple frame designs from a variety of high performing tennis racquets. Multiple racquet frame designs from six different manufacturers were mechanically tested in an ISO17025 certified third-party independent test facility by qualified mechanical and biomechanical engineers. A consistent mass drop technique was employed to provide controlled impact to the center of the head of each mounted racquet. The impact load and duration were plotted and a Fourier Transform Analysis was conducted on each data file. The results of this study showed statistically significant reductions in vibrational dampening time and lower vibrational amplitudes following the initial impact shock for the triple core designs. This evaluation provided consistent baseline comparisons for different handle designs in a manner that demonstrated multi-layered cores of the racquet handle performed better than hollow designs with respect to vibration and force attenuation.
机译：有多种因素会影响机械性能和压力转移到网球运动员的上肢。框架设计，材料，弦张紧，球刚度，冲击位置和玩家技术的变化只是一些潜在的变量，这可能导致从球拍到玩家的应力转移和振动的显着增加或减少。为了更好地理解影响冲击和振动传递到撞击时影响休克和振动传递的重要设计因素，这种测试以标准化和可重复的方式进行，以评估和比较多种框架设计的冲击和振动模式，从各种高性能网球拍。通过合格的机械和生物力学工程师，在ISO17025认证的第三方独立测试设施中机械测试了来自六种不同制造商的多个球拍框架设计。采用一致的质量下降技术为每个安装的球拍的头部的中心提供控制的撞击。绘制的冲击载荷和持续时间并在每个数据文件上进行傅里叶变换分析。该研究的结果表明，在三重核心设计的初始冲击冲击之后，振动阻尼时间和较低振动振幅的统计学上显着降低。该评估为不同的手柄设计提供了一致的基线比较，其方式以比振动和力衰减更好地表现出比空腔手柄的多层芯的方式进行了一致的句柄设计。

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