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PROCEEDINGS OF THE SIXTH INTERNATIONAL CONFERENCE ON THE APPLICATION OF ARTIFICIAL INTELLIGENCE TO CIVIL AND STRUCTURAL ENGINEERING
Edited by: B.H.V. Topping and B. Kumar
The Integration of Computer Aided Design and Analysis Tools using a Logic-Based Approach
D. Jonson, J. de Beer and N. Daya
Center for Advanced Materials, Design and Prototyping Research, Technikon Natal, Durban, South Africa
D. Jonson, J. de Beer, N. Daya, "The Integration of Computer Aided Design and Analysis Tools using a Logic-Based Approach", in B.H.V. Topping, B. Kumar, (Editors), "Proceedings of the Sixth International Conference on the Application of Artificial Intelligence to Civil and Structural Engineering", Civil-Comp Press, Stirlingshire, UK, Paper 1, 2001. doi:10.4203/ccp.74.1
Keywords: computer aided design, finite element, motion analysis, design integration, predicate logic.
The advancements in computer-aided design (CAD) software have revolutionized the traditional design process. The availability of sophisticated solid modeling tools has resulted in increased productivity and improved product quality. Computer- based analysis tools used for evaluating design or process performance have also made significant advances and are capable of analysing complex problems on a routine basis. The next stage in the development of computer-aided engineering tools is the seamless integration of the design generation and design evaluation phases. To date, there is in general no single commercial system that provides solutions to all aspects of the product development process of a specific industrial product. This paper addresses the development of a mechanical design system based on the integration of a CAD system with motion analysis (MA) and finite element analysis (FEA) codes. The basis for this integration involves the use of a common product data model and a mechanism for automating the exchange of information between design and analysis phases using predicate logic. The aim of the work presented is to develop a facility that will allow the designer to perform motion analysis and finite element analysis from within the design environment using the virtual design model without having to construct an analysis model. The approach is based on the use of predicate logic to translate the functional characteristics of the product data model into a script that may be used as input to commercially available analysis software.
There are many CAD software products available that are capable of representing the geometrical characteristics of a particular product's design. These software packages incorporate various features depending on the level of sophistication demanded by the target market. Some packages demonstrate limited functionality and are primarily used as a more productive substitute for the drafting board whilst other products are advanced modular systems that are capable of facilitating a variety of operations ranging from design development via solid modeling through to finite element mesh generation. In order to support the computer-aided design of multi-body systems, the software tools used should include the following functionalities:
The development of a computer-aided integrated mechanical design system for the design and analysis of mechanical systems is based on the combination of a CAD system based on a set of graphics libraries and commercially available motion analysis and finite element analysis codes. The main aim of the system is to provide a seamless interface between the design generation and analysis phases of the product development process. This has been achieved by considering two aspects:
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