英文翻译--计算机与设计.doc

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Computer and Design叔唧徇邙邑踊至丌绕径
The computer has had a major impact on the way everyday tasks associated with design are accomplished .It can be used in many ways to do many things. However, all design tasks accomplished using a computer fall into one of four broad categories:涝伽病藓睾米腮軎湓憨
*design modeling 褐傺瞍员劢湖刎务笤申
*design analysis拒呐黻濡娈炯娥洫缳手
*design documentation财蝻熠茅匣姗玷算鬓卿
1. Design Modeling恨眩胚狲傍砭粽亥聍珀
In CAD/CAM design modeling, a geometric model of a product is developed that describes the part mathematically. This mathematical description is converted to graphic form and displayed on a cathode ray tube (CRT). The geometric model also allows the graphic image to be easily edited and manipulated once
The process begins when a designer creates a graphic image using a special ICG software package. The image is created by entering commands that cause the computer to construct the image out of points, lines, circles, and curves. To create a graphic image, the computer must translate the geometric characters into a corresponding mathematical model. What appears to the designer as a graphic image is stored in the computer as a series of mathematical
As the designer issues commands to edit or manipulate a graphic image, the computer revises the ma