摘要
用频谱分析法,通过计算机实测实验研究弦的线性自由振动和线性受迫振动规律,得到了弦振动的基频和谐频的量值关系,与理论计算结果一致.该实验方法有利于加深学生对机械振动和机械波理论的深入理解,以及掌握用频谱分析法测量物体振动频谱的方法.
Researches on the free vibration and forced vibration of string are carried out by computer-controlled real-time measurement and spectrum analysis. The relations between base frequency and harmonic frequency are obtained, which is in accordance with the theoretical calculations. This experimental method is very helpful for students to understand the mechanical vibration and mechanical wave theory and to master the way of spectrum analysis.
出处
《物理实验》
北大核心
2009年第12期30-33,共4页
Physics Experimentation
基金
教指委教学研究基金项目(No.08031)
河北省"十.一五"规划项目(No.08010137)
唐山师范学院科学研究基金项目成果(No.09D10)
关键词
弦振动
基频
谐频
频谱分析
string vibration
base frequency
harmonic
spectrum analysis
