力学与实践 ›› 2008, Vol. 30 ›› Issue (3): 75-79.DOI: 10.6052/1000-0879-2008-052

• 应用研究 • 上一篇    下一篇

铁饼飞行的轨迹和气动力

陈永丽 朱克勤   

  1. 清华大学 航天航空学院 清华大学工程力学系,100084
  • 收稿日期:2008-01-24 修回日期:1900-01-01 出版日期:2008-06-08 发布日期:2008-06-08

PATH OF DISCUS FLIGHT AND AERODYNAMIC FORCE

  • Received:2008-01-24 Revised:1900-01-01 Online:2008-06-08 Published:2008-06-08

摘要: 从铁饼在空气中飞行所受到的气动力出发,阐述铁饼飞行的轨迹和铁饼 出手时的速度、角度、自转角速度和风作用对成绩的影响. 由于气动力的作用, 45°并非铁饼的最佳投掷角度,实验和理论研究表明:无风时35°/26° 的投掷角/倾角组合最佳;顺风和逆风投掷必须采用不同的投掷角/倾角组合才能获得当地条 件下的最好成绩;铁饼出手时25 r/s的自转速度已经可以满足稳定性的要求.

Abstract: The path of discus flight and the effects of the throw velocity/angle, spin and wind conditions on discus flight are discussed in this paper, considering the aerodynamic force on the discus. The theoretical and experimental investigations of discus flight indicate the following useful conclusions: the optimum combination of throw angle and discus inclination angle is 35°/26° at zero wind, while 45° is not the best release angle due to the aerodynamic force; different combinations of throw angle and inclination angle should be adopted according to local wind conditions; a spin speed of 25 r/s when releasing the discus is enough to stabilize the discus's initial orientation.