巧用光电门改进阻尼振动实验  

Skillfully Using Photoelectric Door to Improve Damping Vibration Experiment

作　　者：李啸越 胡琦珩 冯一帆[1] 李正天[1] 宋伊[1] 丁益民[1] 

机构地区：[1]湖北大学,湖北武汉430062

出　　处：《大学物理实验》2017年第3期99-101,共3页Physical Experiment of College

基　　金：湖北省大学生创新训练计划项目(201610512060)

摘　　要：在气垫导轨上阻尼振动研究的实验中,采用两个光电门分别测量阻尼振动的谐振子振动周期和半衰期,进而求出振动系统的粘滞性阻尼常量。该方法克服了传统实验中采用电子秒表测量谐振子做阻尼振动的半衰期时,因需要人眼观察和手动操作而导致测量误差大的问题,实现了对气垫导轨的粘滞性阻尼常量较为精确的测量。In the study of damping vibration on the air-cushion guide rail, two optical gates are used to measure the vibration period and the half-life of the resonator, respectively, and then the viscous damping constant of the vibration system is obtained. The method overcomes the disadvantages of the traditional electronic stop. When the half-life of damped vibration is measured, the measurement error is large due to the need of human eye ob- servation and manual operation, and the viscous damping constants of the air-cushion guide are measured accu- rately.

关 键 词：粘滞性阻尼常量 光电门 阻尼振动 

分 类 号：O321[理学—一般力学与力学基础]