OptiStruct to ANSYS Conversion Mapping
Conversion Notes
- If CBEAM is associated with PBEAM/PBEAML, then the properties within those
cards will be converted to ANSYS SECTION with type BEAM.
OptiStruct beam cross sections of types: BAR, CHAN, HAT,
I, L, T, ROD, and TUBE are converted to ANSYS equivalent
beam sections.
OptiStruct Z and BOX sections are converted to ANSYS ASEC beam sections. CHAN, Z, and BOX sections are only converted when PBEAML has a HyperBeam section attached. PBEAM is converted to ANSYS ASEC when HyperBeam sections are not attached to a property card. OptiStruct NSM is converted to ANSYS ADDMAS.
Limitation: In the current version of the conversion tool, section offsets are not considered.
- PSHELL and PSHEAR properties are converted to ANSYS SECTIONS with type SHELL. Shell thickness and material from PSHELL/PSHEAR are mapped to TK and Material of SHELL section. After conversion, section offset is always set to MID.
- Conversion of contact surfaces: If contact surfaces in OptiStruct are defined with node sets, then the surfaces will not be converted.
Materials
| OptiStruct | ANSYS | Convert Parameters |
|---|---|---|
| MAT1 | MPTEMP/MPDATA | E, G, NU, RHO, A, GE, TREF |
| MATT1 | MPTEMP/MPDATA | T(E), T(G), T(NU), T(RHO), T(A), T(GE) |
| MAT2 | MATERIAL | density |
| MAT4 | MATERIAL | density |
Elements
| OptiStruct | ANSYS | HM Configuration |
|---|---|---|
| CONM2 | MASS21 | Mass |
| CELAS1 | COMBI14 | Spring |
| CBEAM | BEAM188 | Bar2 |
| CBAR | BEAM44 | Bar2 |
| CROD | LINK8 | Rod |
| CTRIA3, CTRIAR | SHELL181 | Tria3 |
| CQUAD4, CQUADR, CSHEAR | SHELL181 | Quad4 |
| CTRIA6 | SHELL281 | Tria6 |
| CQUAD8 | SHELL281 | Quad8 |
| CTETRA | SOLID45 | Tetra4 |
| CTETRA | SOLID95 | Tetra10 |
| CHEXA | SOLID45 | Hex8 |
| CHEXA | SOLID95 | Hex20 |
| CPENTA | SOLID45 | Penta6 |
| CPENTA | SOLID95 | Penta15 |
| CGAP | CONTACT52 | Gap |
| CBUSH | COMBI14 | Spring |
Properties
| OptiStruct | ANSYS | Convert Parameters |
|---|---|---|
| PBEAM, PBEAML | SECTION | See Note 1. |
| PBAR, PBARL | BEAM44p | None. Only creates a property card. |
| PBUSH | COMBI14p | k1 to k6, GE1 to GE6 |
| PELAS | COMBI14p | k, GE |
| PGAP | CONTACT52p | U0, KA, KT, MU1 |
| PROD | LINK8p | None |
| PSHELL, PSHEAR (tria3, quad4) | SECTION | See Note 2. |
| PSHELL, PSHEAR (tria6, quad8) | SECTION | See Note 2. |
| PSOLID (tetra4, penta6, hex8) | SOLID45p | None |
| PSOLID (tetra10, penta15, hex20) | SOLID95p | None |
ETType of ANSYS
If the model contains OptiStruct elements which were mapped to MASS21, LINK8, COMBI14, BEAM44, SHELL181, SHELL281, SOLID45 and SOLID95 elements, respective ETTYPES will be created and assigned to the component. Key options of ETTYPE are not updated.
Components
If the component collector contains different type of configuration of elements, new components will be created for the respective configurations and those elements will be moved into the new component. ETTYPE, material, and realset section IDs will be assigned to the new component.
Loads and Boundary Conditions
Loads and boundary conditions will not be converted by using this conversion tool.
Contact Surfaces
Conversion of contact surfaces: If in OptiStruct a contact pair's main and secondary are both contact surfaces (CSURF), then the contact surfaces and the pair will be retained after conversion. However, in ANSYS, you must add the details for the surfaces, such as Et type and property card. If the friction coefficient MU1, available in the OptiStruct property card, is attached to the contact pair, then a new material card with a MPDATA card image will be created, and the value will be mapped to MU in the ANSYS format after conversion.