The following NASTRAN cards can be converted to DYNA:
PSHELL
Convert PSHELL into *Section_Shell
A *Part card will be associated to the pshell component.
| • | A new DYNA property *section_shell will be created and assigned to the *Part card. |
| • | The original material ID will be assigned to the *Part. |
| • | The NASTRAN thickness will be assigned to the T1 *section_shell card. |
| • | The NASTRAN NSM value will be assigned to the MAREA DYNA entry. |
Convert PSOLID into *Section_Solid
A *Part card will be associated to the component.
| • | A new DYNA property *section_solid will be created and assigned to the corresponding *Part card. |
| • | The original material ID will be assigned to the *Part. |
Convert PBAR into *Section_Beam
HyperMesh will create different components so that the bar elements using a common NASTRAN property will be moved into a single component.
| • | A *Part card will be associated to this component. |
| • | A new DYNA property *section_beam with ELFORM 2 will be created and assigned to the *Part card. |
| • | The original material ID will be assigned to the *Part. |
| • | The NASTRAN A field will be mapped to the DYNA AREA entry; the NASTRAN Inertia I1 I2 and J will be assigned to the corresponding DYNA values Itt Iss and Irr. |
Convert PBARL (ROD, TUBE, BAR types) into *Section_Beam
HyperMesh will create different components so that the bar elements using a common NASTRAN property will be moved into a single component.
| • | A *Part card will be associated to this component. |
| • | A new DYNA property *section_beam with ELFORM 1 will be created and assigned to the *Part card. |
| • | The original material ID will be assigned to the *Part. |
| • | The nonstructural mass, NSM, will be converted between the solvers. |
| • | For the Pbarl-ROD type, the NASTRAN entry, DIM1, will be moved to the DYNA Ts1 and Ts2. In the *section_beam card, the CST entry will be set to value 1. |
| • | For the Pbarl-TUBE type, the NASTRAN entry DIM1 will be moved to the dyna Ts1 and Ts2, DIM2 will be assigned to the DYNA entries TT1 and TT2. In the *section_beam card, the CST entry will be set to the value 1. |
| • | For the Pbarl-BAR type only, the NASTRAN entry DIM1 will be moved to the dyna Ts1 and Ts2. In the *section_beam card, the CST entry will be set to value 0. |
Convert PBEAM into *Section_Beam
HyperMesh will create different components so that the beam elements using a common NASTRAN property will be moved into a single component.
| • | A *Part card will be associated to this component. |
| • | A new DYNA property *section_beam with ELFORM 2 will be created and assigned to the *Part card. |
| • | The original material ID will be assigned to the *Part. |
| • | The NASTRAN A field will be mapped to the DYNA AREA entry; the NASTRAN Inertia I1 I2 and J will be assigned to the corresponding DYNA values Itt Iss and Irr. |
| Note: | LS-DYNA does not provide a field to store the I12 value; if the I12 value is available, the conversion will not occur. |
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Convert PBEAML into *Section_Beam
The conversion ignores the case of tapered NASTRAN beam with intermediate cross section.
| • | HyperMesh will create different components so that the beam elements using a common NASTRAN property will be moved into a single component. |
| • | A *Part card will be associated to the component. |
| • | A new DYNA property *section_beam with ELFORM 1 will be created and assigned to the *Part card. |
| • | The original material ID will be assigned to the *Part. |
| • | The nonstructural mass NSM will be converted between the solvers. |
| • | For the Pbeaml-ROD type, the NASTRAN entry DIM1(A) will be moved to the dyna Ts1, the DIM1(B) will be moved into Ts2. In the *Section_Beam card the CST entry will be set to value 1. |
| • | For the Pbeaml-TUBE type, the NASTRAN entry DIM1(A) will be moved to the dyna Ts1, the DIM1(B) will be moved into Ts2. The NASTRAN entry DIM2(A) will be moved to the dyna TT1, the DIM2(B) will be moved into TT2. In the *section_beam card the CST entry will be set to value 1. |
| • | For the Pbeaml-BAR type, the NASTRAN entry DIM1(A) will be moved to the dyna TT1 the DIM1(B) will be moved into TT2. The NASTRAN entry DIM2(A) will be moved to the dyna TS1, the DIM2(B) will be moved into TS2. In the *section_beam card the CST entry will be set to value 0. |
