基于复摆测量法阻尼对转动惯量的影响分析  

Analysis on the Influence of Rotational Inertia by Damping Based on Compound Pendulum Measuring Method

作　　者：张心明[1] 王德民[1] 李俊烨[1] 尚春民[1] 胡敬磊 ZHANG Xinming;WANG Detain;LI Junye;SHANG Chunmin;HU Jinglei(School of Mechanical and Electrical Engineering,Changchun University of Science and Technology,Changchun 130022)

机构地区：[1]长春理工大学机电工程学院,长春130022

出　　处：《长春理工大学学报（自然科学版）》2018年第4期54-59,共6页Journal of Changchun University of Science and Technology(Natural Science Edition)

基　　金：吉林省教育厅十三五科学技术研究项目(JJKH20181127KJ)

摘　　要：本文研究目的是应用复摆法测量弹体的转动惯量。测量过程中会受到摩擦阻力,如空气阻力和转轴处或刀口支撑处。不仅与被测物体自身特性有关,如物体大小、形状等,其截面面积和摆轴的长度也会影响空气阻力的大小。转轴支撑处的摩擦阻力与摩擦阻力的大小、光洁程度和被测物体的质量等因素有关。本文研究与分析了复摆法测量转动惯量的理论,讨论了影响复摆法测量弹体转动惯量精度的空气阻尼、摩擦阻尼及其耦合情况,从而为提高复摆法测量转动惯量的精度奠定了理论基础。The purpose of this paper is to apply the compound pendulum method to measure the moment inertia of the projectile. The measurement process will be subject to frictional resistance,such as air resistance and shaft or blade support. Not only with the characteristics of the measured object itself,such as the size of the object,shape,etc.;the cross-sectional area and the length of the pendulum axis will also affect the size of air resistance. The frictional resistance of the shaft support is related to the size of the frictional resistance,the degree of smoothness and the quality of the measured object. In this paper,the theory of measuring the moment inertia is studied and analyzed. The air damping,frictional damping and coupling of the momentary inertia of the projectile are discussed. The precision of the measured moment inertia is improved,which provides certain theoretical basis.

关 键 词：复摆法 空气阻尼 摩擦阻尼 转动惯量 

分 类 号：TJ4[兵器科学与技术—火炮、自动武器与弹药工程]