OSSmooth supports the recovery of geometry modified in a structural optimization for further use in the design process. This tool is part of the Altair OptiStruct software package.
Compared to previous versions, OSSmooth has evolved into a standalone, multi-purpose software package to bridge gaps between CAD and CAE and between topology optimization and shape optimization. It also provides new tools to conduct novel shape optimization.
OSSmooth can be used to:
· Create an iso-density boundary on a topology optimization result.
· Recover the geometry after a topography and shape optimization.
· Reduce the amount of surface data from a given set of triangular patches by combining smaller patches.
· Smooth surface data given as triangular patches.
Geometry recovery involves the intermediate step of running the OSSmooth translator. A parameter file needs to be provided, and OptiStruct automatically exports an OSSmooth parameter file <prefix>.oss with default settings.
Further, OSSmooth requires the <prefix>.fem, <prefix>.sh, and/or <prefix>.grid files from an OptiStruct run. The <prefix>.fem file is the OptiStruct input file. The grid file <prefix>.grid contains the grid point location after a topography and shape optimization and is always output at the end of a topography and/or shape optimization run. The shape file, <prefix>.sh, contains the element density information of a topology optimization and is always output at the end of an optimization run.
The geometry recovered by OSSmooth can be exported as finite elements, as IGES geometry, or as an STL image. It can also be imported into a CAD system.
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OSSmooth currently does not recognize OptiStruct long-format input data. A possible work-around for this problem is to import the long-format input file into HyperMesh and export it using the regular OptiStruct template before running OSSmooth. |
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Recovery of Topology Optimization Results
Recovery of Topography and Shape Optimization Results