| 以支撑脚为参考系的轮滑双蹬技术外刃蹬地动作力学分析 |
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| 引用本文： | 刘锋,关汝华.以支撑脚为参考系的轮滑双蹬技术外刃蹬地动作力学分析[J].吉林体育学院学报,2013,29(1):51-53,87. |
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| 作者姓名： | 刘锋 关汝华 |
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| 作者单位： | 1. 吉林大学体育学院,吉林长春,130012
2. 长春大学旅游学院,吉林长春,130061 |
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| 摘 要： | 探究轮滑运动双蹬技术的外刃蹬地动作是否提高了运动员在前进方向上的速度,运用力学知识对运动员在外刃蹬地时的受力情况、步长、做功、速度和动能的变化进行分析。结果:在假设各种阻力为零的条件下,以支撑脚为参考系,运动员外刃蹬地时身体重心在支撑反作用力的水平分力方向上位移为零,在支撑反作用力水平分力作用的方向上身体重心的速度为零,支撑反作用力的水平分力所做的功为零,身体重心在支撑腿滑进方向上的速度大小没有变化,动能没有增加。结论:在假设各种阻力为零的条件下,以支撑脚为参考系,运动员外刃蹬地时身体重心的合速度没有增大,动能没有增加。
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| 关 键 词： | 双蹬技术 外刃蹬地 支撑脚 参考系 步长 速度 |
Mechanic Analysis on the Outer-edge Pedaling Action of Double-push Skatting Based on the Reference System of Supporting Foot |
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| Liu Feng
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Guan Ruhua.Mechanic Analysis on the Outer-edge Pedaling Action of Double-push Skatting Based on the Reference System of Supporting Foot[J].Journal of Jilin Institute of Physical Education,2013,29(1):51-53,87. |
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| Authors: | Liu Feng Guan Ruhua |
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| Institution: | 1.College of Physical Education,Jilin University,Changchun,130012,Jilin,China; 2.College of Tourism,Changchun University,Changchun,130061,Jilin,China) |
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| Abstract: | By using the knowledge of mechanics the analysis has been performed on the force, step size, power, speed and kinetic energy changes when perform the outer - edge pedaling action. The purpose is to investigate whether the outer - edge pedaling of the miler skating double push technique can efficiently accelerate the forward speed in skatting. Results： under the assumption that the resistance is zero and the support foot as reference system, the shift of player＇ s body weight center and the speed along the direction of horizontal force will be zero, consequently, the gained work will be zero and the forward speed will not change. Conclusion ： supposing all the resistence is zere and the support foot as reference system, the forward resultant speed of the player is not increased via outer edge pedaling in the double push skatting, neither the kinetic energy. |
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| Keywords: | double - push technique outer edge pedaling support foot reference system step size speed |
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