惯量积及其物理意义  

Product of Inertia and its Physical Meaning

作　　者：小普卓玛[1] 

机构地区：[1]西藏大学理学院,西藏拉萨850000

出　　处：《西藏大学学报（社会科学版）》2011年第S1期129-131,共3页Journal of Tibet University

基　　金：质量工程项目2009-2011年度"自治区级特色专业物理学"阶段性成果

摘　　要：惯量张量和惯量积都是刚体运动的动力学特征量,是两个重要的物理量,在理论力学课程教学中占有重要的地位。学生在学习过程对这两个量的理解有较大的难度,特别是惯量积这一概念及其物理意义。文章从张量的矩阵表述入手,给出惯量张量和惯量积的定义,从质量几何的观点出发,对惯量积这一物理量进行了较详尽的分析。Inertia tensor and product of inertia as two important physical quantities are the dynamic character of rigid motion.They are composing an important content in the teaching of the course 'theoretical mechanics'.In the process of learning the course students feel quit difficult to understand the two quantities,especially the concept and physical significance of product of inertia.This article firstly describes the matrix formulation of tensor,and then introduces the definitions of inertia tensor and product of inertia.Additionally,an exhaustive analysis of product of inertia is done at the geometrical aspect.

关 键 词：转动惯量 质量 惯量积 

分 类 号：O313.3[理学—一般力学与力学基础]