物理摆系统大摆角运动的阻尼研究  

Resistance of physical pendulum system for large swing angular motion

作　　者：康秀英[1] KANG Xiu-ying(Department of Physics,Beijing Normal University,Beijing 100875,China)

机构地区：[1]北京师范大学物理学系,北京100875

出　　处：《大学物理》2021年第6期41-44,52,共5页College Physics

摘　　要：本文从理论和实验探究了物理摆在大摆角情况下的非线性动力过程,考虑摩擦阻力和空气阻力的影响,研究了不同初始摆角和不同配重的物理摆的摆角和机械能随时间的衰减过程,对比数值模拟结果,给出了本物理摆系统转轴的摩擦系数为0.025,空气阻力系数为0.68.研究结果将为轴承或铰链等类物理摆结构的动力学建模问题提供参考.In this paper,nonlinear dynamic process of a physical pendulum system with big swing angles is explored theoretically and experimentally.By considering the influence of the friction and the air resistance,the decay process of the pendulum angle and the mechanical energy with time is investigated with different initial angles and masses.By comparing with the numerical simulation results,the friction coefficient of the rotation axis of the physical pendulum and the air resistance coefficient are given as 0.025 and 0.68,respectively.The results can provide a reference for dynamic modeling of the pendulum structures such as bearing and hinge.

关 键 词：物理摆 PASCO实验系统 摩擦系数 空气阻力系数 

分 类 号：O424[理学—声学]