大学物理 ›› 2007, Vol. 26 ›› Issue (11): 25-25.

• 著者文摘 • 上一篇    下一篇

用局部常化三倍角公式研究单摆周期

谭志中 罗礼进   

  1. 南通大学理学院,江苏南通226007
  • 出版日期:2007-11-25 发布日期:2007-11-20

A laconic method for studying the period of'a simple pendulum

  • Online:2007-11-25 Published:2007-11-20

摘要: 应用局部常化方法对三倍角公式进行局部常化处理,对一类非线性动力学方程进行了一种简洁的近似修正,得到精确度较高的大摆角单摆运动周期的两个新结论,同时用此结论推导出一个简洁的推论,并且用3种方法进行了具体比较.

关键词: 非线性方程, 单摆周期, 局部常化, MATLAB, 椭圆积分

Abstract: A kind of laconic method is established for solving the nonlinear dynamics equation and the period of simple pendulum is stadied,three new formulas are obtained, these approximate formulas are compared with the accurate one by charts and errors calculation, furthermore the laconic approximation for complete elliptic integral of the first kind is obtained.

Key words: nonlinear equation, simple pendulum, MATLAB, complete elliptic integral

中图分类号: 

  • O314