扭摆振动实验  

Torsional pendulum experiment

作　　者：孙萍[1] 熊俊[1] 曹慧贤[1] 李蓉[1] 许成伟[1] 

机构地区：[1]北京师范大学物理系,北京100875

出　　处：《物理实验》2006年第12期3-7,19,共6页Physics Experimentation

基　　金：世界银行"高等教育发展"项目

摘　　要：为了丰富“非线性系统实验”课程的教学内容,开设了扭摆振动实验,将力学中的非线性现象引入到教学中.在实验内容的设计上,采取线性振动和非线性振动相结合的方式,即:首先研究扭摆的线性振动,如阻尼振动、受迫振动等,先对振动问题有基本的理解,然后再研究扭摆的非线性振动,分别固定驱动频率、改变励磁电流和固定励磁电流、改变驱动频率,观察非线性摆的运动情况.The torsional pendulum experiment is set up in order to extend the curricula of experiments of nonlinear system. Thus, the nonlinear phenomena of dynamics are introduced to the teaching. The teaching method is adopted to combine the linear vibration and the nonlinear vibration. At first, the linear vibrations, such as damped vibration and forced vibration, are investigated so as to understand the basic rules of vibration. Then, the nonlinear vibrations including fixed forced frequency and fixed excitation current are investigated to understand the new rules of nonlinear vibrations.

关 键 词：扭摆 阻尼振动 受迫振动 分岔 混沌 

分 类 号：O32[理学—一般力学与力学基础]