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Study on the influence of changes of air resistance athletes' taking-off speed in freestyle skiing aerials
1 : Li Dong
College of Sciences, Northeastern University, Shenyang, China -
China
2 : Li Dong
* : Corresponding author
School of Sports Kinetics, Shenyang Sport University, Shenyang, China -
China
| Subject : | : | Oral |
| Comment | : | Freestyle skiing is a competitive sport in the open-air environment. The air resistance that athlete meets in the process of slipping, transition and entering stage determines the athletes' taking-off speed, thus affecting the performance in competition. This paper set up a function model of frontal area and time about L, T, F, DF, F and other single action in the process completed, and establishes the function between windward area and time in specific action (The body of the windward area is changing by time in the whole action process and the ski area can't be ignored). The Adina software is adopted to calculate resistance of air and lift by using the established flow field around the space model of players. It studies and analyses the influence of air resistance on athlete's taking-off speed, combining with the results of the taking-off speed calculation software. The main findings are shown as follows: when the upwind speed is 3m/s, athlete's entering taking-off speed will decrease 1m/s compared with no wind conditions. When the wind speed is low, the change of wind direction exerts little impact on athletes' taking-off speed. |
| Topics | : | Skiing and Pole-vault |
| Keywords | : | research ; reverse modelling ; three ; dimensional solid model ; the finite element method ; the flow field model ; calculation software |
| PDF version | : |  PDF version |
