Import/Export

NextFEM Designer can handle various type of models coming from other commercial software, such as OpenSees, SAP2000, OOFEM, ADAPTIC, Zeus-NL, Abaqus, CalculiX, Midas GEN. Thanks to its general abstraction classes, NextFEM Designer is the best way to convert a model from a program to another (eg. SAP2000 to OpenSees).

It can easily translate the geometry from one to another; in many cases (if the original software can export results), NextFEM Desginer can be used also as a post-processor.

Here you are a list of supported features for each third-part software.

OpenSees

Pre-processing import features:

  • Nodes
  • UniaxialMaterial (partial reading)
    • elastic
    • elasticPP
    • elasticPPgap
    • ENT
    • Concrete01
    • Concrete02
    • Concrete03
    • Steel01
    • Steel02
  • NDMaterial
    • ElasticIsotropic
  • Section (partial reading)
    • Fiber
    • PlateFiber
    • LayeredShell
  • Elements
    • ShellMITC4
    • quad
    • bbarQuad
    • enhancedQuad
    • quadUP (both)
    • ShellDKGQ
    • ShellNLDKGQ
    • ShellNL (treated as 8-node shell)
    • ElasticBeamColumn
    • ElasticTimoshenkoBeam
    • ForceBeamColumn
    • DispBeamColumn
    • beamWithHinges
    • truss
    • corotTruss
    • rotspring2dir
    • zeroLength
    • zeroLengthND
    • zeroLengthSection
    • stdBrick
    • bbarBrick
    • Brick8N
    • brickUP
    • Brick20N
    • 20_8_BrickUP
  • Fix, fixX, fixY, fixZ Commands
  • GeomTransf Commands
  • Uniform Beam Loads
  • Nodal Loads

Post-processing import features:

  • Displacements recorder
  • Reactions recorder
  • Modal Eigenvectors recorder
  • Custom spring data

Midas

Pre-processing Import features:

  • Nodes
  • Elements
    • Beam
    • Truss
    • Plate
    • Wall
    • Elastic link
  • Frame Sections
    • Rectangular
    • Circular
  • Plate and Wall sections
  • Material
  • Member assignments
  • Constraints
  • Frame releases
  • Static load cases
  • Load combinations
  • Distributed beam loads
  • Point loads

Post-processing Import features:

  • Not available yet

SAP2000

To import a model from Sap2000 click on the Import option in the File menu and choose the SAP2000 text file (*.s2k) option from the file type drop-down list.

The supported import pre-processed features are:

  • Joint coordinates
  • Joint restraint assignments
  • Frame connectivity
  • Link connectivity
  • Area connectivity
  • General frame section properties
  • Area section properties
    • Rectangular
    • circular
  • General frame release assignments
  • Frame section assignments
  • Area section assignments
  • Basic mechanical material properties
  • Joint loads
  • Load case definitions

The post-processed import features are:

  • Modal periods and frequencies
  • Joint displacements
  • Joint reactions
  • Frame element forces
  • Shell element forces
  • Shell element stresses

OOFEM

Pre-processing Import features:

  • Analysis type
  • Node
  • Rigidarmnode
  • Beam3D
  • quad1mindlinshell3d
  • tr_shell01

Post-processing Import features:

  • Node displacements
  • Node reactions
  • Element forces and moments
  • Element strains
  • Element stresses

ADAPTIC and Zeus-NL

Pre-processing Import features:

  • Materials
  • Groups
  • Structural Nodal Coordinates (with or without repetitions)
  • Non-structural Nodes (with or without repetitions)
  • Element connectivity (with or without repetitions)
    • CBP3
    • CBP2
    • LNK3
    • JEL3
    • IN16 (partitioning supported)
    • BK20 (partitioning supported)

Post-processing Import features for NUM files:

  • Nodal displacements
  • Nodal velocities (disable by default, check Options)
  • Nodal accelerations (disable by default, check Options)
  • Reactions

 

ABAQUS and CalculiX

Pre-processing Import features:

  • Nodes
  • Element
    • B22
    • B23
    • S3
    • CPS3
    • S4
    • S4R
    • CPS4

Post-processing Import features:

  • Not available yet

Dxf

Pre-processing Import features:

  • Points
  • Line elements
  • Planar elements a 3DFACE

Export features

ABAQUS

  • Nodes
  • Elements
    • B33

OpenSees

  • Nodes
  • Elements
  • Sections
  • Isotropic Materials
  • Restraints
  • Nodal loads

Midas

  • Nodes
  • Elements
    • Beam
    • Triangular plates
    • Quadrilateral plates
  • Groups
  • Isotropic materials
  • Wall and plate sections
  • Restraints
  • Elastic link
  • Nodal masses
  • Loads cases
  • Concentrated loads

SAP2000

  • Joints
  • Frame connectivity
  • Area connect
  • Basic material properties
  • Frame sections
  • Area section ( WARNING: thick shells with drilling DOFs)
  • Section assignments
  • Load cases ( WARNING: Self weight set to zero)
  • Restraints
  • Linear links( WARNING: not yet supported)
  • Concentrated masses
  • Concentrated loads
  • Groups

OOFEM

  • Analysis
    • Linear static
  • Nodes
  • Elements
    • Beam3D
    • Tr_shell01
    • Quod1mondshel3d
    • Lumped mass
  • Sections
  • Isotropic materials
  • Boundary conditions
  • Sets

Dxf

  • Points
  • Line elements
  • Plain elements