从运动波形研究简单弹簧-质量系统的谐运动和参数运动
An undergraduate study of harmonic and parametric motion of a simple spring-mass system from motion waveforms
摘要：
在本科物理实验室研究的弹簧质量系统可能会显示出复杂的动力学，由于重力，弹性和扭转力的同时作用，除了空气摩擦。在本文中，我们描述了一个实验室练习，迎合开始的学生，同时让那些有更多的背景有机会探索更复杂的方面的议案。如果不给学生预定的仪器，但允许他们设计实验装置，他们也可以学到一些物理思想和实验程序。使用由此产生的结果，我们描述了各种弹簧质量振荡模式，讨论了物理的显着偏差，从简谐运动。我们观察到的参数振荡行为的报告和调查。这项研究是基于运动波形的分析。
英文摘要：
The spring-mass system studied in undergraduate physics laboratories may show complex dynamics due to the simultaneous action of gravitational, elastic, and torsional forces, in addition to air friction. In this paper, we describe a laboratory exercise that caters to beginning students while giving those with more background an opportunity to explore more complex aspects of the motion. If students are not given predefined apparatus but are allowed to design the experiment setup, they may also learn something about physics thinking and experimental procedure. Using results thus produced, we describe a variety of spring-mass oscillation patterns, discussing the physics of the significant deviations from simple harmonic motion. The parametric oscillation behavior we have observed is reported and investigated. This study is based on analysis of motion waveforms.
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