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Module category: IO



ReadNastran

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

ReadNastran.png

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
ReadNastranMap.png

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.

ReadNastranRenderer.png


Authors: Martin Aumüller, Ruth Lang, Daniela Rainer, Jürgen Schulze-Döbold, Andreas Werner, Peter Wolf, Uwe Wössner
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COVISE Version 2016.3