关键词: 正投影, 静力学, CAD 软件, 图解

Abstract: The fundamental principle of orthogonal projection can be used to solve
problems that arise in the field of engineering statics. This paper deals mainly with the graphical
solution of elementary, concurrent force and forces in space problems. Some actual examples are
included to illustrate applications of the simple principles and will encourage further study. Most
problems in engineering statics can be solved by either graphical or algebraic methods. In some
cases the algebraic solution is more readily obtained. In other cases, the graphical solution is quick
and more economical. In a number of cases AutoCAD solutions may be well justified.

Key words: orthogonal projection, statics, AutoCAD software, diagram