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Product Model-Based Analytical Models (PBAMs): A New Representation of Engineering Analysis Models


Peak, R. S. (1993) Product Model-Based Analytical Models (PBAMs): A New Representation of Engineering Analysis Models, Doctoral Dissertation, Georgia Institute of Technology, Atlanta.


design-analysis integration, analysis template, CAD-CAE interoperability, engineering knowledge representation, information model, product model-based analytical model (PBAMs), analysis building block (ABB)


In spite of recent advancements in computer aided design and engineering (CAD/E), such as parametric geometry and automatic mesh generation, a large gap exists between computer-based design models and analysis models. Transforming a detailed product design into an engineering analysis model can require large amounts of heterogeneous information, engineering theory, and industrial heuristics. Consequently, traditional computational methods alone are insufficient for the effective automation of this process.

This research defines a new representation of analysis models, termed product model-based analytical models (PBAMs), which enables the automation of a particular class of analysis problems. Specifically, PBAMs automate the instantiation, execution, and interaction of a variety of routine analysis models (i.e., models that are used repeatedly during product design). This research also defines constraint schematics - one of the first known combinations of constraint graph theory and object-oriented concepts for the purpose of representing engineering analysis models. Constraint schematics are one of several views of the PBAM representation. Preliminary guidelines for both developing and implementing PBAMs of routine analysis models are included that utilize these views.

PBAMs enable rapid, flexible, routine analysis by linking detailed design models with potentially many analysis models of varying complexity and application. Furthermore, this representation aides exploration of "what if" design problems by supporting reversible input/output combinations in some cases. The PBAM representation has been evaluated using case studies in the thermomechanical fatigue of solder joints on printed wiring assemblies (Engelmaier, 1983, 1989; Lau, et al., 1986). Results show that PBAMs uniformly represent such analysis models containing a mixture of both formula-based and finite element-based relations.


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