挡光片的宽度和振幅对阻尼振动半衰期测量的影响  

Influence of light barrier width and amplitude on half-life period measurements of damping vibration

作　　者：任佳琪 李飞祥 彭雪城[1] 黄万霞[1] REN Jia-qi;LI Fei-xiang;PENG Xue-cheng;HUANG Wan-xia(School of Physics and Electronic Information,Anhui Normal University,Wuhu 241000,China)

机构地区：[1]安徽师范大学物理与电子信息学院,安徽芜湖241002

出　　处：《物理实验》2020年第3期43-47,共5页Physics Experimentation

基　　金：国家自然科学基金(No.11304002);大学物理教学团队(No.2016jxtd049);安徽师范大学物理与电子信息学院雏鹰工程项目。

摘　　要：在气垫导轨上探究弹簧振子的阻尼振动是普通物理实验中的重要实验,从实验上和理论上探究了挡光片宽度和振幅对半衰期测量的影响.研究结果表明实验测得的半衰期随着挡光片宽度的增加而线性增大,随着初始振幅的增大而减小,而且理论和实验符合的很好.该研究在指导学生正确地选取实验的初始状态,并正确地测量半衰期方面有一定的参考价值.The damping vibration experiment of spring on air track was one of the most important experiments in college physics.The influence of the light barrier width and amplitude on the half-life period was studied theoretically and experimentally.The results showed that the half-life period increased linearly with the increase of the light barrier width and decreased with the increase of the amplitude.Agreement between theory and experiment was achieved.The research had certain significance in guiding students to choose the initial state of the experiment correctly and measure the halflife period accurately.

关 键 词：阻尼振动 弹簧振子 半衰期 挡光片的宽度 振幅 

分 类 号：O321[理学—一般力学与力学基础]