力学与实践 ›› 2021, Vol. 43 ›› Issue (2): 313-315.DOI: 10.6052/1000-0879-20-235

• 身边力学的趣话 • 上一篇    下一篇

再谈拔河比赛中的力学分析 1)

张伟伟2)(), 杜秀丽, 赵子龙   

  1. 太原科技大学力学系, 太原 030024
  • 收稿日期:2020-06-01 修回日期:2020-08-09 出版日期:2021-04-20 发布日期:2021-04-20
  • 通讯作者: 张伟伟
  • 作者简介:2)张伟伟,教授,主要研究方向为结构损伤检测、力学史与方法论。E-mail: zwwps@126.com
  • 基金资助:
    1)国家自然科学基金(11872261);山西省自然科学基金(201801D121012);晋城科技预研项目(20198035)

MECHANICAL ANALYSIS OF TUG-OF-WAR GAMES 1)

ZHANG Weiwei2)(), DU Xiuli, ZHAO Zilong   

  1. Mechanics Department, Taiyuan University of Science and Technology, Taiyuan 030024, China
  • Received:2020-06-01 Revised:2020-08-09 Online:2021-04-20 Published:2021-04-20
  • Contact: ZHANG Weiwei

摘要:

本文建立了拔河运动员的受力模型,分析了拉绳倾角、身体倾角、运动员姿态等因素对拔河结果的影响规律。结果表明,抬高拉绳有利于增大我方的最大静摩擦力;较小的身体倾角有利于减小拉绳的拉力矩,但需要综合考虑拉绳倾角的影响;手臂弯曲后可减小拉绳的拉力矩;腿部微弯会同时导致拉力矩和重力矩减少,但通过脚蹬地,可将腿部力量转化为拉力从而增加对抗力量。

关键词: 拔河, 力学分析, 摩擦因数, 平衡

Abstract:

In this paper, the mechanics model of the athletes in tug-of-war is established. The influences of the rope inclination, the body inclination and the athlete's posture on the result of the tugofwar are discussed in detail. Some suggestions are put forward for the tug-of-war: raising the draw rope will help increase the maximum static friction and increase the chance of winning; a smaller body inclination is helpful to reduce the pulling moment of the rope, but the rope inclination angle has to be considered; bending the arm can reduce the tensile moment; a slight bending of the leg will decrease both the tensile moment and the gravity moment, but by pedaling the ground, the leg strength can be converted into the tensile force, which can increase the countervailing force.

Key words: tug-of-war, mechanics principle analysis, friction coefficient, equilibrium

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