CAGD for Transitional Ruled-Surface Ducts

摘要

By teaching the drawing of special design, which is in the course of engineering drawing, the design for transitional ruled-surface is a very important content. By means of descriptive analytical and differential geometries. With the two kind's ducts as an example, the variation of cross-sectional area and functional equations are discussed in detail. A convenient and practical mathematical mode is provided for computer aided geometric design of the ducts. And the main steps of design program for these ducts are also brief introduced.