Study on Mechanics of a System Consisting of Ski. Bining, Boots and Skier

1.测量仪器的发展仪器的开发，用于快速测量滑雪板的弯曲刚度和扭转刚度.滑雪板的力学性能选择了四种不同结构、不同制造工艺、不同材料和不同尺寸的滑雪板，研究了滑雪板的质量分布。它们被切成小块，并测量每个部分的质量。实验结果表明，每个部分的每单位长度的质量与滑雪板的每单位长度的质量的比率沿着纵向方向以类似的方式变化，与滑雪板的种类无关。因此，人们可以简单地从滑雪板的总质量和长度估计每个部分的质量。其次，利用实验模态分析法测量了滑雪板的阻尼比和固有频率。由于对43种滑雪板进行了测试，因此认为本研究大致弄清了市场上销售的滑雪板的阻尼比。此外，测量了每个小部分的弯曲刚度和扭转刚度。由于小零件的抗弯刚度和抗扭刚度的测量比较困难，其分布至今尚未公布。本研究所获得的实验结果具有一定的参考价值.通过对装订和靴子公司的访问，对装订和靴子的种类、材料、机械性能、测量仪器和标准进行了研究。因此，结合器的释放性能和靴的力学性能对于滑雪模拟是重要的。

1. Development of measuring apparatus Apparatuses were developed for measuring rapidly the flexural rigidity and tortional rigidity of a ski.2. Mechanical properties of a ski Four kinds of ski, of which structure, manufacturing process, material and size are different from each other, were chosen for investigating the distribution of mass of the ski. They were cut into small parts and the mass of each part was measured. Experimental results showed that the ratio of the mass per unit length of each part to the mass per unit length of the ski varies in the similar manner along the longitudinal direction with no relation to the kind of ski. Accordingly, one can estimate simply the mass of each part from the whole mass and length of the ski. Next, the damping ratio and natural frequency of ski were measured by using the experimental modal analysis. Since 43 kinds of ski were measured, it is considered that the damping ratio of the ski sold in markets is roughly made clear in this study. Furthermore, the flexural rigidity and torsional rigidity of each small part were measured. Since the measurement of flexural rigidity and torsional rigidity of small parts was difficult, the distribution of them has not been published at yet. Experimental results obtained in the study are considered to be vary valuable.3. Research on binding and boots By visiting to the companies of binding and boots, research was carried out on kind, material, mechanical properties, its measuring apparatus and standards of binding and boots. It follows that the releasing property of the binding and the mechanical properties of boots are important for the simulation of skiing.