ANSYS to Nastran Conversion Mapping

Conversion Notes

  • All ANSYS solid and shell elements that are currently supported are included in the conversion tool.
  • Material properties – Thermal Conductivity, specific heat, thermal expansion co-efficient can be now converted.
  • Nonlinear material data and temperature dependent materials defined through TB tables are converted to TABLESx cards inside a MATS1.
  • 2D and 3D Orthotropic properties of E, NU, and Alpha can be converted.
  • If components or properties do not have a material associated to them on conversion, then MID = 1 will be associated.
  • On conversion, a model will be cleaned by removing unused sets, ET types, and contact elements.
  • COMBIN14 elements are now converted to CELAS1 if key option2 for COMBIN14 in ANSYS is defined. If key option 3 is defined, it is converted to 3 coincident CELAS (1 per DOF).
  • ANSYS BEAM188 converts to CBEAM now [please note section properties defined using SECDATA card in ANSYS are not yet converted].
  • Forces, Moments, Pressures, Temperatures and Constraints are automatically converted. MODOPT (control cards) will be mapped to EIRGL. ACEL (Control Cards) will be converted to GRAV.
  • BEAM44 element type end release options defined in KEYOPTIONS 7 and 8 are converted to values in fields PA and PB respectively in the CBEAM card.
  • BEAM188 section properties are converted from the BeamSection Collector data and not from the EtType Sensor (this is how the BEAM188 section data is modeled in the HyperWorks ANSYS User Profile).
    • SECTYPE with TYPE equal to BEAM and SUBTYPEs equal to RECT, CSOLID, CTUBE, I, L, T convert to a PBEAML property with corresponding standard section definition.
    • SECTYPE with TYPE equal to BEAM and SUBTYPEs equal to ASEC, QUAD, CHAN, Z, HATS, HREC convert to a PBEAM property with corresponding cross section property values.
  • MPC184 converts to either a RBE2 rigid element or a CBUSH/PBUSH bushing element depending on the KEYOPT(1) value, as follows:
    • KEYOPT(1) equal to 0 converts to RBE2 with constraint DOFs equal to [123]
    • KEYOPT(1) equal to 1 converts to RBE2 with constraint DOFs equal to [123456]
    • KEYOPT(1) equal to 6 converts to CBUSH + PBUSH
      • K4 equals <blank>/0.0
      • K1, K2, K3, K5, K6 equals 1e10
    • KEYOPT(1) equal to 8 converts to CBUSH + PBUSH
      • K1, K4, K5, K6 equals <blank>/0.0
      • K2, K3 equals 1E10
    • KEYOPT(1) equal to 9 converts to CBUSH + PBUSH
      • K2, K3, K4, K5, K6 equals <blank>/0.0
      • K1 equals 1E10
    • KEYOPT(1) equal to 10 converts to CBUSH + PBUSH
      • K1 equals <blank>/0.0
      • K2, K3, K4, K5, K6 equals 1E10
    • KEYOPT(1) equal to 11 converts to CBUSH + PBUSH
      • K1, K4 equals <blank>/0.0
      • K2, K3, K5, K6 equals 1E10
    • KEYOPT(1) equal to 12 converts to CBUSH + PBUSH
      • K2, K3, K4 equals <blank>/0.0
      • K1, K5, K6 equals 1E10
    • KEYOPT(1) equal to 13 converts to RBE2 with constraint DOFs equal to [123456]
    • KEYOPT(1) equal to 14 converts to RBE2 with constraint DOFs equal to [456]
    • KEYOPT(1) equal to 15 converts to RBE2 with constraint DOFs equal to [123]
Assumptions
  • The Conversion tool will only convert entities imported by the ANSYS FE input reader.
  • For shell elements, constant thickness parts are assumed.
  • Analysis types assumed: Static – gravity, forces, pressures and constraints; Modal.

Elements

Table 1. Supported Element Mappings
ANSYS Nastran
mass, CONTAC175 sets, GRID
mass, MASS21 mass, CONM2
rigid, CP equation, MPC
rigid, CERIG rbe2, RBE2
rigidlink, CP equation, MPC
rigidlink, CERIG equation, MPC
rbe3/RBE3 rbe3/RBE3
spring, CONBIN14 spring, CBUSH
bar2, BEAM44 bar2, CBEAM
bar2, BEAM188 bar2, CBEAM
bar2, PIPE16 bar2, CBEAM
bar2, BEAM4 bar2, CBEAM
rod, LINK8 rod, CROD
rod, MPC184 rbe2,RBE2 / spring,CBUSH
tria3, PLANE182 tria3, CTRIA3
tria3, SHELL181 tria3, CTRIA3
tria3, SHELL163 tria3, CTRIA3
tria3, PLANE162 tria3, CTRIA3
tria3, SHELL157 tria3, CTRIA3
tria3, SHELL143 tria3, CTRIA3
tria3, SHELL131 tria3, CTRIA3
tria3, PLANE75 tria3, CTRIA3
tria3, PLANE67 tria3, CTRIA3
tria3, SHELL63 tria3, CTRIA3
tria3, SHELL57 tria3, CTRIA3
tria3, PLANE55 tria3, CTRIA3
tria3, SHELL43 tria3, CTRIA3
tria3, PLANE42 tria3, CTRIA3
tria3, SHELL41 tria3, CTRIA3
tria3, PLANE25 tria3, CTRIA3
tria3, PLANE13 tria3, CTRIA3
quad4, PLANE182 quad4, CQUAD4
quad4, SHELL181 quad4, CQUAD4
quad4, SEHLL163 quad4, CQUAD4
quad4, PLANE162 quad4, CQUAD4
quad4, SHELL157 quad4, CQUAD4
quad4, SHELL143 quad4, CQUAD4
quad4, SHELL131 quad4, CQUAD4
quad4, PLANE75 quad4, CQUAD4
quad4, PLANE67 quad4, CQUAD4
quad4, SHELL63 quad4, CQUAD4
quad4, SHELL57 quad4, CQUAD4
quad4, PLANE55 quad4, CQUAD4
quad4, SHELL43 quad4, CQUAD4
quad4, PLANE42 quad4, CQUAD4
quad4, SHELL41 quad4, CQUAD4
quad4, SHELL28 quad4, CQUAD4
quad4, PLANE25 quad4, CQUAD4
quad4, PLANE13 quad4, CQUAD4
tetra4, SOLID185 tetra4, CTETRA
tetra4, SOLID164 tetra4, CTETRA
tetra4, SOLID97 tetra4, CTETRA
tetra4, SOLID96 tetra4, CTETRA
tetra4, SOLID73 tetra4, CTETRA
tetra4, SOLID72 tetra4, CTETRA
tetra4, SOLID70 tetra4, CTETRA
tetra4, SOLID69 tetra4, CTETRA
tetra4, SOLID64 tetra4, CTETRA
tetra4, SOLID62 tetra4, CTETRA
tetra4, SOLID46 tetra4, CTETRA
tetra4, SOLID45 tetra4, CTETRA
tetra4, SOLID285 tetra4, CTETRA
penta6, SOLSH190 penta6, CPENTA
penta6, SOLID185 penta6, CPENTA
penta6, SOLID164 penta6, CPENTA
penta6, VISCO107 penta6, CPENTA
penta6, SOLID97 penta6, CPENTA
penta6, SOLID96 penta6, CPENTA
penta6, SOLID73 penta6, CPENTA
penta6, SOLID70 penta6, CPENTA
penta6, SOLID69 penta6, CPENTA
penta6, SOLID64 penta6, CPENTA
penta6, SOLID62 penta6, CPENTA
penta6, SOLID46 penta6, CPENTA
penta6, SOLID45 penta6, CPENTA
penta6, SOLID5 penta6, CPENTA
hex8, SOLSH190 hex8, CHEXA
hex8, SOLID185 hex8, CHEXA
hex8, SOLID164 hex8, CHEXA
hex8, SOLID97 hex8, CHEXA
hex8, SOLID96 hex8, CHEXA
hex8, SOLID73 hex8, CHEXA
hex8, SOLID70 hex8, CHEXA
hex8, SOLID69 hex8, CHEXA
hex8, SOLID64 hex8, CHEXA
hex8, SOLID62 hex8, CHEXA
hex8, SOLID46 hex8, CHEXA
hex8, SOLID45 hex8, CHEXA
hex8, SOLID5_1 hex8, CHEXA
tria6, PLANE183 tria6, CTRIA6
tria6, SHELL150 tria6, CTRIA6
tria6, PLANE145 tria6, CTRIA6
tria6, SHELL132 tria6, CTRIA6
tria6, SHELL281 tria6, CTRIA6
tria6, PLANE121 tria6, CTRIA6
tria6, SHELL99 tria6, CTRIA6
tria6, SHELL93 tria6, CTRIA6
tria6, SHELL91 tria6, CTRIA6
tria6, PLANE83 tria6, CTRIA6
tria6, PLANE82 tria6, CTRIA6
tria6, PLANE78 tria6, CTRIA6
tria6, PLANE77 tria6, CTRIA6
tria6, PLANE53 tria6, CTRIA6
tria6, PLANE35 tria6, CTRIA6
tria6, PLANE2 tria6, CTRIA6
quad8, PLANE183 quad8, CQUAD8
quad8, SHELL150 quad8, CQUAD8
quad8, PLANE145 quad8, CQUAD8
quad8, SHELL132 quad8, CQUAD8
quad8, SHELL281 quad8, CQUAD8
quad8, PLANE121 quad8, CQUAD8
quad8, SHELL99 quad8, CQUAD8
quad8, SHELL93 quad8, CQUAD8
quad8, SHELL91 quad8, CQUAD8
quad8, PLANE83 quad8, CQUAD8
quad8, PLANE82 quad8, CQUAD8
quad8, PLANE78 quad8, CQUAD8
quad8, PLANE77 quad8, CQUAD8
quad8, PLANE53 quad8, CQUAD8
tetra10, SOLID191 tetra10, CTETRA
tetra10, SOLID187 tetra10, CTETRA
tetra10, SOLID186 tetra10, CTETRA
tetra10, SOLID148 tetra10, CTETRA
tetra10, SOLID117 tetra10, CTETRA
tetra10, SOLID98 tetra10, CTETRA
tetra10, SOLID95 tetra10, CTETRA
tetra10, SOLID92 tetra10, CTETRA
tetra10, SOLID90 tetra10, CTETRA
tetra10, SOLID87 tetra10, CTETRA
penta15, SOLID191 penta15, CPENTA
penta15, SOLID186 penta15, CPENTA
penta15, SOLID147 penta15, CPENTA
penta15, SOLID117 penta15, CPENTA
penta15, SOLID95 penta15, CPENTA
penta15, SOLID90 penta15, CPENTA
hex20, SOLID191 hex20, CHEXA
hex20, SOLID191 hex20, CHEXA
hex20, SOLID191 hex20, CHEXA
hex20, SOLID191 hex20, CHEXA
hex20, SOLID191 hex20, CHEXA
hex20, SOLID191 hex20, CHEXA

Properties

Table 2. Supported Property Mappings
ANSYS Nastran
LINK8P LINK8P
BEAM4P PBEAM
BEAM44P PBEAM
SOLID45P PSOLID
SOLID46P PSOLID
SOLID70P PSOLID
SOLID95P PSOLID
SOLID97P PSOLID
SOLID117P PSOLID
SOLID185P PSOLID
SOLID191P PSOLID
SHELL28P PSHELL
SHELL41P PSHELL
SHELL43P PSHELL
SHELL57P PSHELL
SHELL63P PSHELL
SHELL91P PCOMP
SHELL93P PSHELL
SHELL99P PCOMP
SHELL131P PCOMP
SHELL132P PCOMP
SHELL143P PSHELL
SHELL150P PSHELL
SHELL157P PSHELL
SHELL181P PSHELL
SHELL281P PSHELL
PLANE2P PSHELL
PLANE42P PSHELL
PLANE82P PSHELL
PLANE145P PSHELL
PLANE183P PSHELL
PIPE16P PBEAML
COMBIN14P PBUSH
MASS21P CONM2

Materials

Table 3. Supported Material Mappings
ANSYS Nastran
MP MAT1
MPDATA MAT1

Loads

Table 4. Supported Load Mappings
ANSYS Nastran
temperature, BF_TEMP temperature, TEMP
temperature, IC_TEMP temperature, TEMP
temperature, D_TEMP temperature, TEMP
pressure, HFLUX pressure, PLOAD2
pressure, ConvBulkTe pressure, PLOAD
pressure, PRESSURE pressure, PLOAD4
constraint, D_VOLT constraint, ASET1
constraint, IC_CONSTRNT constraint, SPCD
constraint, D_CONSTRAIN constraint, SPC
moment, FORCE2 moment, MOMENT
force, FORCE force, FORCE

Sets

Table 5. Supported Set Mappings
ANSYS Nastran
set set

Cards

Table 6. Supported Card Mappings
ANSYS Nastran
ACEL GRAV

Sensors

Table 7. Supported Sensor Mappings
ANSYS Nastran
Link8 PROD
BEAM4 PBEAM
BEAM44 PBEAM
BEAM188 PBEAML
SOLID5 PSOLID
SOLID5 PSOLID
SOLID46 PSOLID
SOLID62 PSOLID
SOLID64 PSOLID
SOLID69 PSOLID
SOLID70 PSOLID
SOLID87 PSOLID
SOLID90 PSOLID
SOLID92 PSOLID
SOLID95 PSOLID
SOLID96 PSOLID
SOLID97 PSOLID
SOLID98 PSOLID
SOLID117 PSOLID
SOLID147 PSOLID
SOLID148 PSOLID
SOLID164 PSOLID
SOLID185 PSOLID
SOLID186 PSOLID
SOLID187 PSOLID
SOLID191 PSOLID
SOLSH190 PSOLID
SOLID226 PSOLID
SOLID227 PSOLID
SOLID285 PSOLID
SHELL28 PSHELL
SHELL41 PSHELL
SHELL43 PSHELL
SHELL51 PSHELL
SHELL57 PSHELL
SHELL63 PSHELL
SHELL91 PCOMP
SHELL93 PSHELL
SHELL99 PCOMP
SHELL131 PCOMP
SHELL132 PCOMP
SHELL143 PSHELL
SHELL150 PSHELL
SHELL157 PSHELL
SHELL181 PCOMP OR PSHELL
SHELL281 PCOMP OR PSHELL
PLANE2 PSHELL
PLANE13 PSHELL
PLANE25 PSHELL
PLANE35 PSHELL
PLANE42 PSHELL
PLANE67 PSHELL
PLANE75 PSHELL
PLANE77 PSHELL
PLANE78 PSHELL
PLANE82 PSHELL
PLANE83 PSHELL
PLANE121 PSHELL
PLANE145 PSHELL
PLANE162 PSHELL
PLANE183 PSHELL
PLANE223 PSHELL
PIPE16 PBEAM
COMBIN14 PBUSH
MASS21 CONM2
MPC184 PBUSH