摘要
“明日环”魔术也称魔结,或“喜结良缘”。当环自由下落时,套在其中间的闭合链条会迅速打结将环紧紧扣住。“明日环”魔术由于打结过程迅速,只有不到80 ms,背后隐藏的有趣力学原理很少被大家熟知。本文利用由4台高速相机组成的高速相机阵列实验平台,拍摄并重建了“明日环”魔术中链条打结这一关键过程。对环的运动和链条运动的定量分析发现,链条在魔术过程中存在鞭梢效应,使其能够在肉眼无法分辨的速度下完成打结,鞭梢效应是魔术成功的关键力学原理。
The magic“tomorrow ring”is also known as magic knot,or“the merry matrimony”.When the ring is in free fall,the closed chain within will quickly knot to fasten the ring.Due to the rapid knotting process of“tomorrow ring”magic,(less than 80 milliseconds),the interesting mechanics behind are rarely known.In this paper,a high-speed camera array experiment platform composed of four high-speed cameras is used to photograph and reconstruct the key process of chain knotting in the magic of“tomorrow ring”.The quantitative analysis of the movement of the ring and the chain found that the key mechanical principle of the success of magic is the whipping effect,enabling it to complete the knot at a speed that the naked eye can not distinguish.
作者
黎熠哲
巩伟杰
张伟伟
尹玲
宋加雷
LI Yizhe;GONG Weijie;ZHANG Weiwei;YIN Ling;SONG Jialei(College of Mechatronics and Control Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China;School of Mechanical and Engineering,Dongguan University of Technology,Dongguan 523808,Guangdong,China)
出处
《力学与实践》
北大核心
2023年第4期935-939,共5页
Mechanics in Engineering
基金
广东省基础与应用基础研究基金联合基金-青年基金项目(2020A1515110584)
东莞理工学院博士基本科研启动费(211135014)
广东省城市生命线工程智慧防灾与应急技术重点实验室项目(2022B1212010016)资助。
关键词
明日环
鞭梢效应
高速摄像
tomorrow ring
whipping effect
high speed photography
