Module category: IO

• ReadNastran
  • Parameters
  • Output Ports
  • Examples

ReadNastran

ReadNastran reads data written by MSC Nastran in binary output2 Version 70 format.

It currently supports the following subset of the NASTRAN data format:

Data block	Data Cards
GEOM1S	CORD2C, CORD2R, CORD2S, GRID
GEOM2S	CBAR, CHEXA, CPENTA, CQUAD4, CTRIA3, PLOTEL, CONM2
GEOM3S	FORCE, MOMENT, GRAV, TEMP
GEOM4S	RBAR, RBE2, SPC1
OQG1	-
OUGV1	-
OEF1X	CQUAD4, CTRIA3, CBAR
OES1X	CQUAD4, CTRIA3

GEOM1S,GEOM2S, GEOM3S, GEOM4S : Problem Definition

OQG1, OUGV1, OEF1X, OES1X : Analysis Results

ReadNastran is available for COVISE version 4.5. It's tested on SGI and HP systems.

Parameters

Name	Type	Description
output2_path	File Browser	Nastran file (output2) location.
plotel_color	String	The color name to draw the PLOTEL elements.
conm2_color	String	The color name to draw the CONM2 elements.
conm2_scale	Scalar	The scale factor to draw the CONM2 elements.
force_color	String	The color name to draw the FORCE elements.
grav_color	String	The color name to draw the GRAV elements.
moment_color	String	The color name to draw the MOMENT elements.
rbar_color	String	The color name to draw the RBAR elements.
rbe2_color	String	The color name to draw the RBE2 elements.
spc1_color	String	The color name to draw the SPC1 elements.
spc1_scale	Scalar	The scale factor to draw the SPC1 elements.
mode	Scalar	If more than one mode was found in the analysis results (OUGV1 and OES1X), the mode number (starting from 1) can be selected here.
fibre_distance	Scalar	Fibre distance value to calculate the van Mises stress OES1. Must be either 1 or 2.
try_skipping	Boolean	-

Output Ports

Name	Type	Description
outputMESH	UnstructuredGrid	The geometry as an unstructured grid.
outputTYPE	IntArr	The element and property id's for a further selection through the module SelectUSG.
outputPLOTEL	Lines	PLOTEL is drawn as lines connecting the grid points.
outputCONM2	Polygons	The location of the CONM2 card is drawn as small squares.
outputFORCE	Lines	FORCE is drawn as a line.
outputMOMENT	Lines	MOMENT is drawn as a line.
outputGRAV	Lines	GRAV is drawn as a line.
outputTEMP	Float	The temperature information of the nastran file.
outputRBAR	Lines	RBAR is drawn as lines connecting the grid points.
outputRBE2	Lines	GRAV is drawn as lines connecting the grid points.
outputSPC1	Lines	The SPC1 card visualizes the degrees of freedom (DOFs) at different grid points. The notation is as follows: A simple arrow indicates a possible translation along this axis. A double arrow indicates a possible rotation around this axis. A triple arrow indicates a possible translation and rotation.
outputOQG1	Vec3	The reaction forces (vectors).
outputOUGV1	Vec3	The displacements (vectors).
outputOEF1	Vec3	The element forces (vectors).
outputOES1	Vec3	Van Mises stress data.
try_skipping	Boolean	Some programs create non-standard NASTRAN files. If you get an error message while reading in the file try to turn this parameter on.

Examples

Figure: covise/net/examples/ReadNastran.net

The example shows a simple map for displaying the geometry of an unstructured grid, generated from a NASTRAN structural analysis data sample. Additional temperature data is mapped through the Colors module path onto the geometry. The VectorField module maps the reaction forces OQG1 onto the geometry represented as white lines.

The next image is a snapshot of the results in the Inventor Renderer.