Parameter study using a finite element simulation of a carving Alpine ski to investigate the turn radius and its dependence on edging angle, load, and snow properties
Parameter study using a finite element simulation of a carving Alpine ski to investigate the turn radius and its dependence on edging angle, load, and snow properties
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DOI：
10.1007/s12283-010-0039-y
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发表时间：
2010-05-01
影响因子：
1.7
通讯作者：
Dual, Juerg
中科院分区：
文献类型：
--
作者：
Federolf, Peter;Luethi, Anton;Dual, Juerg
对于滑雪板制造商来说，了解给定的滑雪板固定系统在不同负载条件下的性能非常重要。重要的性能参数是滑雪板变形和由此产生的转弯半径。本研究的重点是雕刻转弯。这项研究的目的是：（1）调查的依赖性的转弯半径的边缘角，结合载荷，和雪硬度使用有限元（FE）模拟，（2）比较的结果与预测的一个常用的模型介绍了豪。有限元模拟使用了准静态方法（类似于Howe的模型），但滑雪板-雪相互作用模型包含了在雕刻转弯期间在雪中形成的凹槽。在40 °的切边角度下，有限元模拟结果与Howe的模型吻合良好。然而，对于大的边缘角（[50度]），计算的转弯半径趋于平稳，而Howe的模型趋于零。这种影响在软雪条件下比在硬雪条件下更明显。约束力的增加导致计算的转弯半径减小。总之，有限元模拟表明，特别是在大的边缘角的雪中的槽需要考虑在滑雪板-雪相互作用的模型或在转弯半径的计算。
For ski manufacturers, it is important to know how a given ski-binding system performs under different loading conditions. Important performance parameters are the ski deformation and the resulting turn radius. This study focuses on carving turns. The aims of this study were: (1) to investigate the dependence of the turn radius on edging angle, load on the binding, and snow hardness using a finite element (FE) simulation, and (2) to compare the results with predictions of a frequently used model introduced by Howe. The FE simulation used a quasi-static approach (similar to Howe's model), but the ski-snow interaction model incorporated the groove that forms in the snow during a carved turn. Up to edging angles of 40 degrees, the results of the FE simulation agreed well with Howe's model. However, for large edging angles ([50 degrees) the calculated turn radius leveled out, whereas Howe's model tends to zero. This effect was more pronounced for soft snow than for hard snow conditions. Increasing forces on the binding caused a decrease in the calculated turn radii. In summary, the FE simulation showed that particularly at large edging angles the groove in the snow needs to be considered in models of the ski-snow interaction or in computations of the turn radius.