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Quadrilateral finite element meshing of Robot Shifter PANASONIC-TM1400 model.
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Extensive testing of our IGES converter software brought to our attention
a fact that some IGES models include two types of IGES entities that allow engineers
to repeat multiple collections of same objects at different locations
within the model. For that reason we decided to implement a support for those two types
of IGES entities, namely: type 308 (Subfigure Definition) and type 408
(Subfigure Instance) for a specific case of subfigures comprised by Trimmed Surfaces only.
This real-life IGES model, in addition to being constructed entirely by repeating
collections of Subfigures, also demonstrates two additional features that we needed to address:
- automatic division of long-and-narrow subdomains, and
- special procedures for step size selection for long-and-narrow subdomains
that are parts of arbitrarily shaped domains.
Long-and-narrow rectangular-shaped subdomains represent integral features
in this model and therefore cannot be omitted. If a long edge of a long-and-narrow
subdomain is formed by only one curve (a straight line in this case) then the step size
value along this curve is constant. Step size along all curves forming the boundary
of a long-and-narrow subdomain tends to be very small in order to be compatible with
the domain small width. This causes proliferation of small step sizes in adjacent subdomains.
As a result, due to physical limitation of computer RAM, meshing of the entire IGES
model may not be feasible.
However, automatic division of long-and-narrow rectangularly shaped subdomains to parts,
now implemented, promotes variability of step sizes along long edges, which, in turn,
results in significant reduction of the total number of finite elements created by the consequent
mesh generation by QUAD-SURFACE.
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For more examples of the application of our leading
finite element meshing product QUAD-SURFACE 4.0 , please follow this link.
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.
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To learn more about the full range of our products please follow this link.
Our youtube channel is here.
Please contact us to find out more, preferably by e-mail on comecau@ozemail.com.au or
comecauinfo@gmail.com.
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