| 树枝上的小鸟——趣说刚体平衡1) |
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| 引用本文： | 张伟伟, 薛书杭, 王志华. 树枝上的小鸟——趣说刚体平衡1)[J]. 力学与实践, 2019, 41(2): 244-246,243. doi: 10.6052/1000-0879-18-011 |
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| 作者姓名： | 张伟伟 薛书杭 王志华 |
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| 作者单位： | *太原科技大学力学系, 太原 030024; †山西大学附属中学,太原 030006; **太原理工大学力学学院,太原 030024 |
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| 基金项目： | 1)山西省高等学校教学改革创新(J2017160)资助 项目 |
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| 摘 要： | 为了提高理论力学课堂的趣味性,本文以树枝上小鸟作为刚体平衡的例子,应用力的平行四边形法则、力的可传性、三力平衡汇交定理等基本原理分析了树枝上小鸟的双腿受力,以及啄木鸟尾巴在保持身体平衡中的作用,并讨论了小鸟不同姿态对其受力的影响,期望达到提高学习兴趣、寓教于乐、改善教学效果的目的。
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| 关 键 词： | 刚体平衡 静力学 理论力学 |
| 收稿时间： | 2018-01-03 |
RIGID EQUILIBRIUM AS EXEMPLIFIED BY BIRDS STANDING ON A BRANCH1) |
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| Zhang Weiwei, Xue Shuhang, Wang Zhihua. RIGID EQUILIBRIUM AS EXEMPLIFIED BY BIRDS STANDING ON A BRANCH1)[J]. Mechanics in Engineering, 2019, 41(2): 244-246,243. doi: 10.6052/1000-0879-18-011 |
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| Authors: | Zhang Weiwei Xue Shuhang Wang Zhihua |
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| Affiliation: | *The Department of Mechanics, Taiyuan University of Science and Technology, Taiyuan 030024, China; †The Affiliated High School of Shanxi University, Taiyuan 030006, China; ** The College of Mechanics, Taiyuan University of Technology, Taiyuan 030024, China |
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| Abstract: | To enhance the students' interest for studying Theoretical Mechanics, two teaching cases of static equilibrium are designed in this paper, as the static analysis for birds standing on a branch. Some knowledge points, such as the parallelogram of force, the transmissibility of force, the three-force balance intersecting principle and the conditions of rigid body equilibrium, are used to analyze the forces on the bird' legs on a branch; and the function of the woodpecker tail when it pecked the worm. It is a very enjoyable and educational experience for the students, and can raise students' interest in learning and improve teaching results. |
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| Keywords: | rigid equilibrium statics theoretical mechanics |
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