*ossmooth2

Syntax

*ossmooth2 femfile load_op outputcode tetrameshingcode units autobead autobeadthreshold autobeadlayer isosurface surfacecode densitythreshold distancecoefficient optismoothboundary lapiteration lapfeatureangle lapsmoothboundary remesh surfacereduction reductionfeatureangle

Type

HyperMesh Tcl Modify Command

Description

This command extracts the final design geometry from OptiStruct topology, topography or shape optimization results.

Inputs

femfile

OptiStruct base input file from which to extract the final geometry

load_op

Execution/load option:

• 0 - Create .oss file only to be used in standalone version (do not execute ossmooth)
• 1 - Do not load geom.
• 2 - Load geom

outputcode

Output file format:

• 1 - Nastran
• 2 - IGES
• 3 - STL
• 4 - H3D

tetrameshingcode

Flag indicating whether to create tetramesh after creating isosurface (1=yes, 0=no). Only to be used in standalone version.

units

Units to use for IGES output:

• 1 - inch
• 2 - mm
• 4 - foot
• 6 - meter
• 10 - cm

autobead

Flag indicating whether to create an autobead design (1=yes, 0=no).

autobeadthreshold

Threshold value for autobead (real value ≥ 0 and ≤ 1).

autobeadlayer

Layer value for autobead (integer value 0 or 1).

isosurface

Flag indicating whether to create an isosurface (1=yes, 0=no).

surfacecode

The method to use:

• 0 - no smoothing, isosurface only
• 1 - Optimization based smoothing
• 2 - no smoothing, element threshold
• 3 - Laplacian smoothing

densitythreshold

The density threshold for topology optimization (real value ≥ 0 and ≤ 1).

distancecoefficient

The distance coefficient to use in optimization based smoothing (real value ≥ -50 and ≤ 50).

optismoothboundary

Flag indicating whether to include the boundary or not in optimization based smoothing (1=yes, 0=no).

lapiteration

The number of iterations to use in Laplacian smoothing (integer ≥ 0).

lapfeatureangle

The feature angle to use in Laplacian smoothing (real value ≥ 1 and ≤ 80).

lapsmoothboundary

Flag indicating whether to include the boundary or not in Laplacian smoothing (1=yes, 0=no).

remesh

Flag indicating whether to remesh when creating an autobead design or/and isosurface (1=yes, 0=no).

surfacereduction

Flag indicating whether to use surface reduction (1=yes, 0=no).

reductionfeatureangle

The feature angle to use when requesting surface reduction (real value ≥ 1 and ≤ 80).

Example

The following example executes OSSmooth on the c:/test/os1.fem, c:/test/os1.grid and c:/test/os1.sh files, loading geometry back to HyperMesh, requesting Nastran output, creating 1 layer autobead with remesh design with 0.3 bead threshold, no surface reduction, 0.3 topology optimization threshold, Laplacian smoothing, 10 iterations, 30 degrees feature angle and include the boundary:

*ossmooth2 "c:/test/os1.fem" 2 1 0 1 1 0.3 1 1 3 0.3 0 0 10 30 1 1 0 10

Errors

None.

Version History

10.0