| As the application of CAD technology is developing, the traditional CAD technology is developing toward integrative, intelligent and networking. Meanwhile, CAD technology has been dedicated to the development of specialization to pursue the more convenient, more accurate, more efficient, more economical design patterns in specific industries and professional fields.This paper is commissioned by an institute of heat exchange in Harbin to study and develop an intelligent design platform of feedwater heaters for power plant. As a typical and large process equipment that need strict security-reliability and high economy, while the design of feedwater heaters is complicated, strongly empirical, and heavily depending on the successfully designed case; Therefore, developing a specialized intelligent design platform of feedwater heaters for power plant is of great significance to improve design efficiency, to reduce design cost, and accumulate the design resources in enterprise. So far, research on intelligent design at home and abroad is very deep and wide, but little effort has been input to carry out feedwater heaters for power plant intelligent design platform. According to actual condition, the main research contents in the paper are as follows:Established integrated information model of feedwater heaters based on the feature model. Through comprehensive analysis the conceptual and detailed design process of the feedwater heating equipment, this paper describe the complex design information and manufacturing information in hierarchically and functionally to support the construction of the platform.Established the feedwater heaters design platform based on the theory of product platform. After analyzing the products, the product family is constructed by clustering the similar parts, and the constraint relationship between modules is also defined. The knowledge system which includes the product design and configuration knowledge is also established. By analyzing the diversity of product knowledge, the methods of organizing configuration knowledge in hierarchically and classified is put forward; While the design knowledge is represent by object-oriented representation method that makes easily to integrate with CAD system. By studying the difference between the traditional platform configuration and the configuration of this paper discussed, the configuration algorithm is build which can output the product modules set that meet the requirements with the predefined relationships between modules. So, configuration design based on platform is achieved.Research on module division and the design process planning based on the Design Structure Matrix (DSM). Modules are the basis of design platform. So, module division and process planning is the guarantee that the design activities would carry out quickly. This paper proposes a method of modular division based on DSM with information flow. After analyzing the shortcoming of traditional module division method in supporting information flow model and DSM planning on concurrent design activities, the extended DSM with directed fuzzy DSM(dFDSM) and undirected fuzzy DSM(uFDSM) is put forward, then, a general model of module division is also constructed. For this product of feedwater heaters, the extended DSM can do three things at once: merging the coupling design activities, integrated concurrent design activities, planning the design process. Finally, it achieves the target of rapid design.The design platform developed based on variant design technology with the UG 3D system. It was applied in the institute these days. The result shows the platform is valuable. The development theory, process and technology of this paper can provide a reference for other process equipment, hull machinery. |
PDF Full Text Request