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首页> 外文会议>Biennial Conference on the Engineering of Sport >Investigation and assessment of the edge grip of snowboards with laser vibrometry-a proposal of a standardised method
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Investigation and assessment of the edge grip of snowboards with laser vibrometry-a proposal of a standardised method

机译：激光振动器滑雪板边缘握把的调查与评估 - 一种标准化方法的提案

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摘要

The edge grip of a snowboard defines its ability of holding the arc of a carving turn without intending to break out. In order to assess the vibrational movements of the edge under simulated loading conditions, two boards were put on the edge on a soft foam surface and loaded with 400 N such that the boards bent under the added load and the edge was in full contact with the surface. The shovels of the boards were excited with a swept sine signal from 5-200 Hz and the displacements measured with a laser vibrometer. The last edge point in contact with the surface proved to have the largest movement range. Maximal displacement was caused by the first torsional mode at 115-125 Hz, followed by combined bending/torsional modes at lower frequencies (23-30Hz, 80-90 Hz). One board exhibited a larger movement range in the first torsional mode compared to the other board, and the frequency peak of this mode was wider. The mobility index of this board, introduced in this study as the normalized area under the displacement curve of the last edge point, was 1.5 times higher than the index of the other board. The method used in this study offers an accurate quantification of the movement of the edge under standardized load conditions.
机译：滑雪板的边缘夹具定义了它在不打击突破的情况下保持雕刻转弯弧的能力。为了在模拟的负载条件下评估边缘的振动运动，将两个板上放在软泡沫表面上的边缘上，并装有400 n，使得在附加载荷和边缘下的板弯曲的电路板完全接触表面。电路板的铲子被激发，扫过的正弦信号，5-200 Hz，用激光振动计测量的位移。与表面接触的最后边缘点被证明是具有最大的运动范围。最大位移是由115-125Hz的第一扭转模式引起的，然后在较低频率（23-30Hz，80-90Hz）下组合弯曲/扭转模式。与另一个板相比，一块电路板在第一扭转模式下展出了较大的移动范围，并且这种模式的频率峰值更宽。本研究中介绍的该板的移动性指数作为最后边缘点的位移曲线下的归一化区域，比另一个板的指数高1.5倍。本研究中使用的方法提供了准确地定量边缘在标准化负载条件下的运动。

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