利用改装电铃的受迫振动测量液体的粘滞系数  

Measurement of Viscosity Coefficient of Liquid by Forced Vibration of Modified Electric Bell

作　　者：戴雄英[1] 朱泽豪 孙杰 丁子俊 DAI Xiongying;ZHU Zehao;SUN Jie;DING Zijun(School of Computational Science and Electronics,Hunan Institute of Engineering,Xiangtan 411104,China)

机构地区：[1]湖南工程学院计算科学与电子学院,湘潭411104

出　　处：《湖南工程学院学报（自然科学版）》2022年第4期31-34,共4页Journal of Hunan Institute of Engineering(Natural Science Edition)

基　　金：湖南省教育厅重点研究项目(21A0449);湖南省普通高等学校教学改革研究项目(HNJG-2020-0759).

摘　　要：通过改装电铃使小球在蓖麻油中产生受迫振动,用示波器测量液体中振子的谐振频率,求得液体阻尼系数,依据弹性振子在液体中做受迫振动时的受力情况以及斯托克斯公式和阻尼力公式,进而确定了液体粘滞系数.本文所采用的实验方法比传统落球法测得的粘滞系数更加精确且现象明显,提供了一种测量液体粘滞系数的新方法.According to the force of the elastic vibrator in the forced vibration in the liquid,Stokes formula and damping force formula,the viscosity coefficient of castor oil is obtained by a new experimental method.A electric bell is refitted to make the small ball produce forced vibration in castor oil in this method,and the resonance frequency of the vibrator in the liquid is measured with an oscilloscope.The damping coefficient is calculated from this frequency.The experimental method used in this paper is more accurate and obvious than the traditional falling ball method,which provides a new method to measure the viscosity coefficient of liquid.

关 键 词：改装电铃 受迫振动 阻尼系数 粘滞系数 陶瓷蜂鸣片 振动频率 

分 类 号：O321[理学—一般力学与力学基础]