Simplification of CAD Geometries to perform CEM Simulations

Abstract: The purpose of this study is to investigate small features in CAD geometries which have high influence on computational time and memory consumption during electromagnetic simulations using CAE software. Computational Electromagnetics (CEM) simulations of complex CAD geometries like passenger cars crash often simulations remain incomplete due to a lot of irrelevant details. The key to eliminating the limitations enumerated above is to remove irrelevant details in CAD geometries within the acceptable margin of accuracy. The maximum 5% percentage of error in accuracy during Computational Electromagnetics (CEM) simulations is compromised. CAD geometry is transferred into CAE geometry. The modification of geometry is done by removing irrelevant details to get optimal mesh and improve the computational time and memory consumption during simulations with ANSA and HYPERMESH software at their best potential. At the end, electromagnetic simulations are done on original and simplified CAD models in CST and in COMSOL. Only magnetic flux density distribution across the modified and unmodified CAD model by cut points 3D on different coordinate positions is analysed. The results are compared with quality of mesh in terms of accuracy and reduction in computational time and memory. The features in CAD geometries are identified, these features can be removed and computational time and memory consumption reduced with minimum loss of accuracy during simulation.