利用液体超声驻波演示光弹效应的实验研究  

Research on the Experiment of Demonstrating Photoelastic Effect Using Liquid Ultrasonic Standing Wave

作　　者：刘彧希 杨晓彤 郭庆宇 张頔 李春燕[3] Liu Yuxi;Yang Xiaotong;Guo Qingyu;Zhang Di;Li Chunyan(College of Information and Electrical Engineering,China Agricultural University,Beijing 100083;College of Water Resource&Civil Engneering,China Agricultural University,Beijing 100083;College of Science,China Agricultural University,Beijing 100083)

机构地区：[1]中国农业大学信息与电气工程学院,北京100083 [2]中国农业大学水利与土木工程学院,北京100083 [3]中国农业大学理学院,北京100083

出　　处：《物理通报》2021年第12期132-136,共5页Physics Bulletin

基　　金：2020年高等学校教学研究项目,项目编号:DJZW202009hb。

摘　　要：本实验利用超声驻波能量分布特性,使各向同性液体介质密度发生规律性变化,得到各向异性的液体介质从而演示光弹效应.相比于传统的演示方法,该实验通过颜色转变直观地体现折射率变化导致的光弹效应,操作简单且现象明显,让观察者更好地认识光的偏振性质,是对传统教学的一种有益补充.Compared with the traditional demonstration experiment of photoelastic effect,we extended a new demonstration instrument of photoelastic effect based on the subject content.This instrument can demonstrate the liquid medium in the environment where mechanical stress cannot be applied by human.By using the energy distribution characteristics of ultrasonic standing wave,the density of the isotropic liquid medium is changed,and the anisotropic liquid medium is obtained,thus demonstrating the photoelastic effect.This innovative use of ultrasound in liquid medium demonstrated in photoelastic effect,simple operation and phenomenon obviously,based on the change of the colors of intuitive feel the effect of refractive index change,use the color change of the macroscopic response of abstract physical concept,at the same time,better let viewers know polarization properties of light waves,is a useful complement to traditional teaching.

关 键 词：光弹效应演示 超声驻波 大学物理实验 

分 类 号：G642.423[文化科学—高等教育学] O436.3-33[文化科学—教育学]