New Vertical Flow Heat Exchanger Components Of Cad / Cae Integration Technology Research And Application

CAD and CAE play very important roles in developing and designing modern production. CAD is mainly used to promote the speed and quality of drawing, but improvement of production's capacity and quality, reduction of production' cost and cut-down of design period depend indeed on the help of CAE. In the course of design with CAD, CAE can be applied to improve design structure and capacity, reduce production's cost by numerical simulating of models and evaluating of production's capacity. Though CAE has very strong function in finite element analysis (FEA), it has so many difficulties in modeling that the time spent on modeling almost occupy a half of the one of whole analysis process. In order to overcome these difficulties, the integration of CAD/CAE is the best choice. Modeling created with CAD can be used to analyzing of CAE, it will reduce the difficult_ ties of modeling and improve efficiency of analysis and design. CAD/ CAE integration is an important trend in analysis and design of modern production.As a new type of energy-saving equipment, the Tubular Heat Exchanger with Longitudinal Flow of the Shellside fluid (THELFSF) has many remarkable advantages. It betters anti-vibration and anti-smudge performance, enhances heat transfer efficiency, and decreases the shellside pressure loss. It also prolongs service lifetime, reduces the weight and saves material. In order to promote the population of the new technology, HECAD software was developed by Thermal Energy Research Center of Zhengzhou University. As a 2D CAD drawing software, it realized the automatic design of process design, mechanic_ al design, components design and assembly drawing design of THELFSF. However, along with the development of software and hardware and the evolvement of design thought, not only 2D drawing but also 3D solid modeling is needed in modern design of heat exchang_ er's parts. Moreover, FEA of modeling can be processed on the basis of 3D modeling of parts and 3D temperature field and stress field can be obtained on the condition of operati_ ve status. Designer can modify the design and optimize the structure of parts modeling. Ideal productions with better capacity and lighter weight can be designed at last. Hence, if 3D solid modeling of parts can be created with advanced modern CAD and CAE technology and designer can modify design defect and optimize structure on the basis of 2D drawing, HECAD software will be upgraded and expandedThe subject of the dissertation stems from the Research and Development of CAD/ CAE Intelligent Integration technology of Important Process Equipments which is one ofmagnitude Science and Technology of Henan province. CAD/CAE integration system is designed and realized, and it can not only create 2D drawing but also corresponding 3D solid model. 3D solid modeling can be imported into ANSYS software and FEA can be processed on the 3D solid modeling. CAD/CAE integration system plays a significant role in improving the design and manufacture level of heat exchanger's parts, promoting the efficient of design and analysis of parts, and reducing the developmental period and cost. Main research and innovative work of this dissertation is as follows:1) Project database technology is proved necessary in 3D modeling system by introducing the uses and function of project database. Parameterized modeling technology is used to create the 3D solid modeling at the driving of geometrical parameter, hence, the data source including geometrical parameter of part's structure is the basis of 3D modeling system. Geometrical parameter database named after hedata.mdb of heat exchanger's parts is created with Access, and operating principle and programming of Open Database Connectivity(ODBC) technology is analyzed. On the environment of Visual C++ 6.0 and ObjectARX 2000, an interface between 3D modeling system and geometrical parameter database headta.mdb is developed with the application of ODBC technology. Through the interface, 3D modeling system can firstly visit the database and obtain the da...