Research And Development Of The Cad System Of Spherical Tanks

The development of CAD technology has affected every phase in the process of industrial product design, and this brought great changes to traditional design method. Broadly used in chemistry, petrochemistry and other industries as an important equipment, spherical tanks have received great attention on their research and development. The combination of CAD and spherical tanks' design will increase the quality and efficiency of design and shorten the developing cycle of new manufactures. But result from the considerable specialty of CAD software development, existing chemical equipment CAD software drop behind computer application technology and have a series of problems in development, maintenance, extension and upgrade. So it shows great values to figure out a practical set of chemical equipment CAD system.This paper studies how to develop the CAD system for spherical tanks 桽TCAD with Object-Oriented and parameterized technologies. And the method for realizing the system with ObjectARX on the platform of Visual C++6. 0 and AutoCAD2000 is also put forward.By using the method of OMT, Object-Oriented Analysis (OOA) model of the system is upbuilt through analyzing problem domain and system responsibility. Based on the analysis model, the Object-Oriented Design(OOD) model is upbuilt after four components are complementally analyzed and designed which are problem domain, human interface, task management and database management. Furthermore, coupling, cohesion and reuse of the system are analyzed from the viewpoint of software engineering. This shows that the system accords with the criterion of weak coupling, close cohesion and reusable. At last the system completes the assembly drawing of equipments using the parameterized technology and the method of parts scrabbling. The parameterized drawing and hiding are realized.