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Nastran to LS-DYNA Conversion |
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Nastran to LS-DYNA Conversion |
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Use the Conversion tool to convert a Nastran file to a LS-DYNA file.
| 1. | Load the Nastran user profile. |
| 2. | Import a Nastran model. |
| 3. | To run the conversion macro, from the menu bar, click Tools > Convert > Nastran >To LsDyna. The Conversion tab opens. |
| 4. | To start the conversion, click Convert. After the conversion, the selected version of the LS-DYNA user profile automatically loads. |
| 5. | Review and export the deck using the LS-DYNA user profile. Some of the keywords in the Nastran deck are converted to the LS-DYNA deck as per the following tables. |
Element Mapping
Nastran type |
LS-DYNA type |
CONM2 |
*ELEMENT_MASS or *ELEMENT_INERTA |
CWELD |
Meshless weld (feabsorb, fe realize using HEXA) |
CDAMP1/CDAMP2 (0 length) |
*ELEMENT_DISCRETE (card edit for ground option check box) |
PLOTEL |
*ELEMENT_PLOTEL |
RBAR/RBE2/RJOINT |
*CONSTRAINED_NODAL_RIGID_BODY |
RBE3 |
*CONSTRAINED_INTERPOLATION |
CBAR/CBEAM/CROD/CTUBE/CBUSH CELAS1/CELAS2 |
*ELEMENT_BEAM |
CTRIA3/CTRIAR CQUAD4, CQUADR, CSHEAR CQUAD8, CTRIA6 (Change to 1st order then convert) |
*ELEMENT_SHELL |
CTETRA4/CHEXA8/CPENTA6 CTETRA10/CHEXA20/CPENTA15 (Change to 1st order then convert) |
*ELEMENT_SOLID |
Property Mapping
Nastran type |
LS-DYNA type |
PBAR/PBEAM/PROD (Only single section PBEAM is supported) |
*SECTION_BEAM |
PBARL/PBEAML/PRODL (ROD, TUBE, BAR) |
*SECTION_BEAM |
PBUSH |
*SECTION_BEAM + *MAT_GENERAL_SPRING_DISCRETE_BEAM |
PELAS |
*SECTION_BEAM + *MAT_1DOF_GENERALIZED_SPRING |
PDAMP |
*SECTION_DESCRETE |
PSHELL/PSHEAR |
*SECTION_SHELL |
PSOLID |
*SECTION_SOLID |
PCOMP PCOMPG |
*PART_COMPOSITE +*ELEMENT_SHELL with angle option; all materials referred in PCOMP, PCOMPG converted to *MAT_ORTHOTROPIC_THERMAL |
Material Mapping
Nastran type |
LS-DYNA type |
MAT1 |
*MAT_ELASTIC |
MAT2 |
*MAT_PIECEWISE_LINEAR _PLASTICITY |
MAT4 |
*MAT_PIECEWISE_LINEAR _PLASTICITY |
MAT8 |
*MAT_ORTHOTROPIC_ELASTIC |
MAT9 |
*MAT_ANISOTROPIC_ELASTIC |
Coordinate System Mapping
Nastran type |
LS-DYNA type |
CORD1R |
*DEFINE_COORDINATE_NODE |
CORD2R |
*DEFINE_COORDINATE_SYSTEM |
Load Mapping
Nastran type |
LS-DYNA type |
SPC |
*BOUNDARY_SPC |
FORCE |
*LOAD_NODE_POINT |
MOMENT |
*LOAD_NODE_POINT |
PLOAD4 |
*LOAD_SEGMENT |
TEMP |
*INITIAL_TEMP |
