Parameter Command

• 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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In DDM-based FE response sensitivity analysis, the sensitivity parameters can be material,

geometry or discrete loading parameters. Each parameter should be defined as:

parameter $tag <specific object arguments>

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$tag	integer tag identifying the parameter.
<specific object arguments>	depend on the object in the FE model encapsulating the desired parameters.

Note: Each parameter must be unique in the FE domain, and all parameter tags must be numbered sequentially starting from 1.

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For example,

• To identify the elastic modulus, E, of the material 1 at section 3 of element 4, the <specific object arguments> string becomes parameter 1 element 4 section 3 material 1 E
• To identify the elastic modulus, E, of elastic section 3 of element 4 (for elastic section, no specific material need to be

defined), the <specific object arguments> string becomes:

parameter 1 element 4 section 3 E

• To parameterize E for element 4 with material 1 (no section need to be defined), the <specific object arguments> string

simplifies as:

parameter 1 element 4 material 1 E

Notice that the format of the <specific object arguments> is different for each considered element/section/material. The user is : referred to the corresponding section of this manual for the specific set of parameters and the relative <specific object

arguments> format.