LS-DYNA to Nastran Conversion Mapping

Elements

Table 1. Supported Element Mappings
LS-DYNA Nastran
*ELEMENT_MASS CONM2
*ELEMENT_INERTIA CONM2
*ELEMENT_BEAM CBAR
*ELEMENT_SHELL CTRIA3,CQUAD4, CQUAD8, CTRIA6
*ELEMENT_SOLID CTETRA4/CHEXA8/CPENTA6
*CONSTRAINED_SPOTWELD RBAR
*ELEMENT_PLOTEL PLOTEL
*CONSTRAINED_INTERPOLATION RBE3
*CONSTRAINED_NODE_SET RBE2
*ELEMENT_DISCRETE CELAS1

Properties

Table 2. Supported Property Mappings
LS-DYNA Nastran
*SECTION_SOLID PSOLID
*SECTION_SHELL PSHELL
*SECTION_BEAM PBAR, PBARL

*SECTION_BEAM with ELFORM 1 is mapped to the PBARL property.

*SECTION_BEAM with ELFORM 2 is mapped to the PBAR property.

Materials

All the LS-DYNA materials are mapped MAT1 in Nastran.

Boundary Conditions

Table 3. Supported Boundary Condition Mappings
LS-DYNA Nastran
*BOUNDARY_SPC SPC
*LOAD_NODE_POINT FORCE, MOMENT
*LOAD_SEGMENT PLOAD4
*INITIAL_TEMP TEMP

Coordinate System

Table 4. Supported Coordinate System Mappings
LS-DYNA Nastran
*DEFINE_COORDINATE_NODE CORD1R
*DEFINE_COORDINATE_SYSTEM CORD2R