Moxnes John F, Hausken Kjell
Department for Protection, NDRE, P.O. Box 25, N-2007 Kjeller, Norway.
Comput Methods Biomech Biomed Engin. 2009 Oct;12(5):531-51. doi: 10.1080/10255840902788561.
The forces during the kicking phase in Nordic diagonal stride skiing are described by differential equations and the results are compared with experiments. The difference between static and dynamic friction, interacting with characteristics of the skier such as weight, velocity and the kicking force's angle with the terrain, are essential for high-velocity diagonal striding. Analytical results for relationships between glide length, friction and kicking force are shown. Aerodynamic drag and gravity are accounted for. A propulsion force based on the Hill (1970) equation for muscle contraction velocity and activation is constructed. The model shows a feasible tool for studying the effects of ski stiffness, the kicking force and the amount of waxing during diagonal stride skiing.
用微分方程描述了北欧斜向跨步滑雪蹬地阶段的力，并将结果与实验进行了比较。静摩擦力和动摩擦力之间的差异，以及与滑雪者体重、速度和蹬地力与地形夹角等特征的相互作用，对于高速斜向跨步至关重要。给出了滑行长度、摩擦力和蹬地力之间关系的分析结果。考虑了空气阻力和重力。构建了基于希尔（1970年）肌肉收缩速度和激活方程的推进力。该模型是研究斜向跨步滑雪时滑雪板刚度、蹬地力和打蜡量影响的可行工具。
