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Processing and conversion of IGES data files for the purposes of finite element mesh generation
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QUAD-SURFACE 4.0
is our company's
top-of-the-range quadrilateral finite element mesh generator
for planar and curved surfaces in 3D space. QUAD-SURFACE uses its proprietary input data format,
which is perfectly suitable for generation of finite element models.
However, IGES data files, which are normally generated by CAD systems,
are not specifically designed for finite element generation.
They require fundamental processing with the purpose to make them suitable for mesh generation.
QUAD-SURFACE uses surfaces interpolation technologies different from those implemented in IGES.
Importation of IGES data file into QUAD-SURFACE would be impossible without meticulous
data processing by a series of specific methods and algorithms, heavily relying on computational geometry.
The principal purpose of IGES-2-SUR project comprises a part of a well-known issue
of interoperability between design and analysis, primarily of various mechanical parts
commonly encountered in machinery and in means of transportation.
The current version of the product is considered as alfa-release of a more comprehensive
on-going IGES data processing and conversion effort of our company.
The major goals that we pursued undertaking this project were as follows:
development of efficient mathematical algorithms for conversion of
IGES trimmed NURBS-surfaces (whose boundaries are described either
by curves in 3D model space or by curves in parametric spaces of surfaces) to QUAD-SURFACE surfaces;
development of algorithms converting IGES trimmed surfaces of revolution
(whose boundaries are described either by curves in 3D model space or
by curves located on surfaces) to QUAD-SURFACE surfaces of revolution;
to develop algorithms to ‘correct and repair’ IGES data files from
erroneous and/or inconsistent geometrical information that appears
as a result of user errors or is inherent for the trimming process;
to develop an efficient algorithm for automatic step size calculation
along surface boundaries curves.
Below we provide images of two examples of how IGES-2-SUR convertrer successfully
processed IGES data, eliminated user errors, and created SUR-files for the consequent
quadrilateral finite element meshing on the surfaces using QUAD-SURFACE 4.0.
The models represent a metal clamp and a jet engine turbine blade.
Both models contained a variety of data inconsistencies such as extremely short
segments, excessive number of points on some curves, long-and-narrow subdomains.
The inconsistencies were identified and processed, thus making accurate mesh generation
feasible.
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To learn more about the full range of our products please follow this link.
Please contact us to find out more, preferably by e-mail on comecau@ozemail.com.au or
comecauinfo@gmail.com.
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