Q. How can I import a mesh into CFX-Pre 10.0 from Nastran?
A. CFX-Pre should be able to read in a Nastran file directly, but occasionally you may get an error saying:
"Unable to import mesh: Invalid large field line"
This may be because you are unknowingly using an older and little-used 'wide line' version of the Nastran format. CFX-Pre will try to read this format, but it cannot be guaranteed. If you can, use a more recent version with the short lines.
A major consideration with mesh import is how to define the 2D regions so that they appear in CFX-Pre for use as boundary condition locations. Within the Nastran file, CFX-Pre reads the PLOAD4 (and to a lesser extent PLOAD and PLOAD2) fields and turns them into boundary locations. The answer is then to define some pressure loads on external surfaces of the mesh before export, separate load definitions for separate regions.
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Q. How can I import a mesh into CFX-Pre 10.0 from Nastran? A. CFX-Pre should be able to read in a Nastran file directly, but occasionally you may get an error saying: "Unable to import mesh: Invalid large field line" This may be because you are unknowingly using an older and little-used 'wide line' version of the Nastran format. CFX-Pre will try to read this format, but it cannot be guaranteed. If you can, use a more recent version with the short lines. A major consideration with mesh import is how to define the 2D regions so that they appear in CFX-Pre for use as boundary condition locations. Within the Nastran file, CFX-Pre reads the PLOAD4 (and to a lesser extent PLOAD and PLOAD2) fields and turns them into boundary locations. The answer is then to define some pressure loads on external surfaces of the mesh before export, separate load definitions for separate regions. |
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