Nastran to LS-DYNA Conversion Tool

Nastran that can be converted to LS-DYNA.

  • PSHELL
  • PSOLID
  • PBAR
  • PBARL
  • PBEAM
  • PBEAML

PSHELL to *Section_Shell Conversion

A *Part card will be associated to the pshell component.
  • A new LS-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 LS-DYNA entry.

PSOLID to *Section_Solid Conversion

A *Part card will be associated to the component.
  • A new LS-DYNA property *section_solid will be created and assigned to the corresponding *Part card.
  • The original material ID will be assigned to the *Part.

PBAR to *Section_Beam Conversion

Engineering Solutions 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 LS-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 LS-DYNA AREA entry; the Nastran Inertia I1 I2 and J will be assigned to the corresponding LS-DYNA values Itt Iss and Irr.

PBARL (ROD, TUBE, BAR types) to *Section_Beam Conversion

Engineering Solutions 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 LS-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 LS-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 LS-DYNA Ts1 and Ts2, DIM2 will be assigned to the LS-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 LS-DYNA Ts1 and Ts2. In the *section_beam card, the CST entry will be set to value 0.

PBEAM to *Section_Beam Conversion

Engineering Solutions 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 LS-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 LS-DYNA AREA entry; the Nastran Inertia I1 I2 and J will be assigned to the corresponding LS-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.

PBEAML to *Section_Beam Conversion

The conversion ignores the case of tapered Nastran beam with intermediate cross section.
  • Engineering Solutions 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 LS-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 LS-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 LS-DYNA Ts1, the DIM1(B) will be moved into Ts2. The Nastran entry DIM2(A) will be moved to the LS-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 LS-DYNA TT1 the DIM1(B) will be moved into TT2. The Nastran entry DIM2(A) will be moved to the LS-DYNA TS1, the DIM2(B) will be moved into TS2. In the *section_beam card the CST entry will be set to value 0.