Accession Number:

ADA605431

Title:

Development of a CAD Model Simplification Framework for Finite Element Analysis

Descriptive Note:

Master's thesis

Corporate Author:

MARYLAND UNIV COLLEGE PARK DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

2012-01-01

Pagination or Media Count:

121.0

Abstract:

Analyzing complex 3D models using nite element analysis software requires suppressing featuresparts that are not likely to in uence the analysis results, but may signi cantly improve the computational performance both in terms of mesh size and mesh quality. The suppression step often depends on the context and application. Currently, most analysts perform this step manually. This step can take a long time to perform on a complex model and can be tedious in nature. The goal of this thesis was to generate a simpli cation framework for both part and assembly CAD models for nite element analysis model preparation. At the part level, a rule-based approach for suppressing holes, rounds, and chamfers is presented. Then a tool for suppressing multiple speci ed part models at once is described at the assembly level. Upon discussion of the frameworks, the tools are demonstrated on several di erent models to show the complete approach and the computational performances. The work presented in this thesis is expected to signi cantly reduce the manual time consuming activities within the model simpli cation stage. This is accomplished through multiple featurepart suppression compared to the industry standard of suppressing one featurepart at a time. A simpli ed model speeds up the overall analysis, reducing the meshing time and calculation of the analysis values while maintaining and on occassion inproving the quality of the analysis.

Subject Categories:

  • Numerical Mathematics
  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE