QuadWithSensitivity Element

• Sensitivity_Command_Manual
  • General Commands
    • reliability
    • parameter
    • addToParameter
    • updateParameter
    • sensitivityIntegrator
    • sensitivityAlgorithm
    • recorder
  • Material Commands
    • uniaxialMaterial
    • nDmaterial
  • Section Commands
    • Fiber
    • Elastic
    • Aggregator
  • Element Commands
    • dispBeamColumnWithSensitivity
    • quadWithSensitivity
    • bbarBrickWithSensitivity
  • Constraint Commands
    • Transformation

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This command is used to construct a 2D four-node quadrilateral element object based on a bilinear isoparametric formulation.

element quadWithSensitivity $eleTag $iNode $jNode $kNode $lNode $thick $type $matTag <$pressure $rho $b1 $b2>

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$tag	integer tag identifying an existing parameter.
$iNode $jnode $kNode $lNode	four nodes defining element boundaries (numbered following a counter-clockwise order around the element).
$thick	element thickness (constant).
$type	string representing material behavior. Valid options depend on the nDMaterial object and the corresponding available material formulations. The ‘type’ parameter can be either "PlaneStrain" or "PlaneStress".
$matTag	tag associated with previously-defined NDMaterial object.
$pressure	surface pressure (set temporarily equal to zero for DDM-based sensitivity analysis).
$rho	element mass density (per unit volume) from which a lumped element mass matrix is computed (optional, default=0.0).
$b1 $b2	constant body forces defined in the isoparametric domain (optional, default=0.0).

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All parameters are the same as those in the ‘quad’ element command. Currently there are no sensitivity parameters in the ‘quadWithSensitivity’ element command.