Solid Modeling Requirements for Finite Element Modeling Using Mapped Mesh Techniques.

摘要

A three-dimensional mesh generation project is progressing in the CAD Technology Division at Sandia National Laboratories. The project goals are to provide advanced geometric modeling capabilities with automatic discretization routines for finite element model creation. The project supports finite element analysis activities conducted at Sandia. Typical analyses performed include linear and non-linear structural, linear and non-linear thermal, and hydrodynamic calculations. The use of quadrilateral and hexahedral finite elements is the common thread in this broad spectrum of analysis. Our effort is designed to produce finite element models exclusively composed of quadrilateral or hexahedral elements. Our mesh generation work is being accomplished with the PADL2 (BROW82) solid modeler developed by Production Automation Project personnel at the University of Rochester. PADL2 has served as the basis for several commercial modelers. The mesh generation work is progressing from prototype development to a production environment. We desire to interface the mesh generator with other solid modelers that offer additional functionality and robustness. This paper identifies requirements that must be satisfied by solid modeling systems to support finite element mesh generation developments. Although these requirements are based on our finite element modeling effort, it is obvious that many of them are generic to a variety of applications. 9 refs., 6 figs. (ERA citation 14:023920)