念力转机运动原理的研究
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摘要
对念力转机的运动原理进行了理论分析和实验研究.理论上基于念力转机的力学原理,分析它的转动原理,研究其转动特性.理论分析表明念力转机前端铁钉做周期性类椭圆运动,木棍和铁钉的振动带动螺旋桨转动,螺旋桨的转动方向取决于水平振动和竖直振动的相位差.实验上采用光放大法观察念力转机的运动过程,实验结果和理论分析结果吻合.实验表明用手施加水平力时,螺旋桨的旋转方向与手的触碰位置有关.实验还发现单位时间摩擦凹槽的数目越多,螺旋桨转速越大,两者具有线性关系.
This paper has made theoretical analysis and experimental research on the motion principle of the gee-haw whammy diddle. In theory, based on the mechanics principle of the gee-haw whammy diddle, the principle of rotation is analyzed and its rotation characteristics are studied. The theoretical analysis shows that the iron nail in the front end of the gee-haw whammy diddle does periodic elliptic movement, the vibration of the stick and the iron nail drives the rotation of the propeller as well as the rotation direction of propeller depends on the phase difference between horizontal and vertical vibration. In the experiment, the optical amplification method is used to observe the movement process of the gee-haw whammy diddle. The experimental results agree with the theoretical analysis results. Experiments show that the rotation direction of the propeller is related to the contact position of the hand when the horizontal force is exerted by the hand. It is also found that the more the number of the notches are rubbed per unit time, the higher the rotating speed of the propeller, they have a linear relationship.
This paper has made theoretical analysis and experimental research on the motion principle of the gee-haw whammy diddle. In theory, based on the mechanics principle of the gee-haw whammy diddle, the principle of rotation is analyzed and its rotation characteristics are studied. The theoretical analysis shows that the iron nail in the front end of the gee-haw whammy diddle does periodic elliptic movement, the vibration of the stick and the iron nail drives the rotation of the propeller as well as the rotation direction of propeller depends on the phase difference between horizontal and vertical vibration. In the experiment, the optical amplification method is used to observe the movement process of the gee-haw whammy diddle. The experimental results agree with the theoretical analysis results. Experiments show that the rotation direction of the propeller is related to the contact position of the hand when the horizontal force is exerted by the hand. It is also found that the more the number of the notches are rubbed per unit time, the higher the rotating speed of the propeller, they have a linear relationship.
引文
[1] Miller J S. The notched stick[J]. Am J Phys, 1955,23 (3):176.
[2] Laird E R. A notched stick[J]. Am J Phys, 1955,23(7): 472-473.
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[4] Marek M, Badin M, Plesch M. Gee-Haw Whammy Diddle[EB/OL].https://en.wikipedia.org/wiki/Gee-haw_whammy_diddle.
[5] Seyranian A P, Belyakov A O. How to twirl a hula hoop[J]. American Journal of Physics, 2011, 79 (7) : 712-721.
[6] 刘延柱. 呼啦圈的力学[J].力学与实践,2010, 32 (1):102-104.
[7] 陈成钧. 呼啦圈的物理学[J]. 物理, 2015, 44 (1):47-50.
[8] 白生华,张克复. 两个相互垂直不同频率简谐振动合成的探讨——用微机研究李萨如图的尝试[J]. 大学物理, 1988, 1(8):16-20.
[9] 王浩辉. 神奇的念力棒[J].课程教育研究,2018,31(2):22-24.
[2] Laird E R. A notched stick[J]. Am J Phys, 1955,23(7): 472-473.
[3] Ibrahim R A. Friction-induced vibration, chatter, squeal, and chaos—Part II: Dynamics and modeling[J]. Appl. Mech. Rev,1994, 47 (7) : 227-253.
[4] Marek M, Badin M, Plesch M. Gee-Haw Whammy Diddle[EB/OL].https://en.wikipedia.org/wiki/Gee-haw_whammy_diddle.
[5] Seyranian A P, Belyakov A O. How to twirl a hula hoop[J]. American Journal of Physics, 2011, 79 (7) : 712-721.
[6] 刘延柱. 呼啦圈的力学[J].力学与实践,2010, 32 (1):102-104.
[7] 陈成钧. 呼啦圈的物理学[J]. 物理, 2015, 44 (1):47-50.
[8] 白生华,张克复. 两个相互垂直不同频率简谐振动合成的探讨——用微机研究李萨如图的尝试[J]. 大学物理, 1988, 1(8):16-20.
[9] 王浩辉. 神奇的念力棒[J].课程教育研究,2018,31(2):22-24.