大学物理 ›› 2013, Vol. 32 ›› Issue (4): 46-46.

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三维弹簧摆的内共振特性分析

刘宁昕[1] 董坤[1] 章曦[2] 杨露[1] 陈宇翔[1]   

  1. [1]解放军理工大学通信工程学院五队,江苏南京210007 [2]解放军理工大学理学院物理教研中心,江苏南京211101
  • 出版日期:2013-04-20 发布日期:2013-04-20

Analysis of the autoparametric resonance of three-dimensional spring pendulum

  • Online:2013-04-20 Published:2013-04-20

摘要: 通过理论推导和MATLAB数值计算分析了三维弹簧摆的内共振特性,发现在一定条件下,三维弹簧摆在水平面内投影的运动可以近似为不断偏转的线段.通过分析三维弹簧摆在水平面内投影运动的极角,发现其在一段时间内在某一定值附近变化不大;在微振动情形下,极角的变化值与初始条件的变化满足线性关系.

关键词: 三维弹簧摆, MATLAB, 内共振

Abstract: The autoparametric resonance of three-dimensional spring pendulum is analyzed in terms of both the theory and the numeral calculation. It is found that the motion of three-dimensional spring pendulum in the horizon- tal plane can be approximated as the line segment with continuous deflection. The polar angle of the spring pendu- lum in the horizontal plane remains approximately constant within a period of time. In the case of micro-vibration the relation between the change of polar angle and the initial conditions is linear.

Key words: three-dimensional spring pendulum, MATLAB, autoparametric resonance

中图分类号: 

  • O321