# This input deck is used to create the Craig-Bampton Reduction (CBR)
# superelement from a single block.  This superelement will later
# be plugged into a different mesh
SOLUTION
  case cbr
    cbr
    # The number of modes used controls the fidelity/accuracy of the
    # the resultant superelement.  The superelement will only be
    # able to capture responses up to the frequency of the modal basis.
    nmodes=4        
    # This title will be embedded in the created superelement file and
    # can later be queried
    title 'CBR example for "Sierra/SD Example" document'
END

# This section defines the parameters for creating the superelement
cbmodel
   # This is the interface of the super element.  This is where the superelement
   # can be attached to the other models, and also where output such as displacement
   # can be extracted.
   nodeset=nodelist_3
   # Superelement will be written in 'Matlab' format to 'cbr.m'.
   # 'cbr.m' can be read directly int Matlab to populate various
   # matrices for use in investigating and processing the
   # element.
   format=mfile
   file=cbr.m
   # This tells SD to compute the eigenvalues of the completed
   # reduced superelement.  These can be used as a check that
   # superelement was formed as expected and is indeed
   # representing the frequency range of interest
   globalsolution
end

history
  # For superelement solution case 'history' defines the Output Transfer
  # Matrix (OTM).  The OTM outputs supplementary information output
  # the superelement that defines output to reconstruct displacements,
  # strains, or stresses at various internal points.
  nodeset 1:2
  disp
end

FILE
  # Mesh of the geometry to turn into a super element
  geometry_file 'cbr.exo'
END

BOUNDARY
  # No boundary conditions, free/free system
END

OUTPUTS
  # For this case the 'displacements' output are the Eigen mode shapes
  disp
END

ECHO
END

BLOCK 1
        material 2
END

MATERIAL 2
        E 30e6   # Youngs modulus
        nu .3    # Poisson ratio
        density 0.288
END