大学物理 ›› 2009, Vol. 28 ›› Issue (1): 1-1.

• 著者文摘 •    下一篇

关于质点弹簧系统在重力作用下的静平衡与振动

朱洪玉   

  1. 内江师范学院物理系,四川内江641112
  • 出版日期:2009-01-25 发布日期:2009-01-20

The static equilibrium and the vibrations of the spring-particle system under the action of the gravitational force

  • Online:2009-01-25 Published:2009-01-20

摘要: 质点弹簧系统在重力作用下的静平衡状态由此系统的有效质量决定;其本征振动频率ω。则由弹簧与质点的质量之比m1/m2决定;ωn的平均值ω与ω^2由此系统的初始条件决定,不同的初始条件导致不同的平均值.例如,若u(y,0)=u0f(y)=u0y,则可得ω^2=k/(m2+1/3m1).并给出一个计算θ1=ω1/ω0的近似公式.

关键词: 拉格朗日变量, 质量, 形状函数, 本征频率, 初始条件, 平均值

Abstract: The static equilibrium configuration of the spring-particle system under the action of the gravitational force depends on the effective mass of the system;the eigenvihration frequncies ωn of the system depends on the mass ratio between the spring and the paticle. The mean values of ωn depends on the initial conditions of the system,the different initial conditions lead to different mean values of the ωn.For example, if u(y,0)=u0f(y)=u0y,thenω^2=k/(m2+1/3m1). An accurate approximate-calculation formula for θ1=ω1/ω0 is derived.

Key words: Lagrange variable, mass, shape function, eigenfrequncies, initial conditions, mean values

中图分类号: 

  • O32