大学物理和工程力学在机构运动分析中的应用

大学物理和工程力学（理论力学）是工科学生必修的基础课和专业基础课.运动学又是这两门课程中的核心内容之一,其目的是学生通过对运动学的学习,掌握自然界中运动点（动点）和刚体运动的基本理论和分析方法.但对于一些机械机构的运动分析究竟是采用物理方法还是工程力学（理论力学）的方法经常会产生混淆,甚至出现缪误.本文结合一个具体的运动机构,探讨大学物理方法和工程力学（理论力学）的方法在机构运动分析中的区别以及不同坐标系下运动分析值得注意的问题.

APPLICATION OF COLLEGE PHYSICS AND ENGINEERING MECHANICS IN KINEMATIC ANALYSIS OF MECHANICAL MECHANISM

For engineering students, college physics and engineering mechanics （theoretical mechanics） are compulsory basic course and professional course, respectively. Kinematics is one of the core contents in this two courses, and its purpose is to help students master the basic theory and analysis methods of the motions of movement points （moving points） and rigid body in nature through learning the kinematics. But, for some special mechanical mechanism, it is often confusing to choose which method should be used between the physical method and the engineering mechanics （theoretical mechanics） method, and there are even errors. In this work, the difference between the physical method and the engineering mechanics method are discussed, and the noteworthy issues resulted in different coordinate systems for motion analysis are described through using a specific moving mechanism.