SensitivityAlgorithm 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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The most general command is the following, which computes the response sensitivity at each time/load step, after the response has converged.

sensitivityAlgorithm -computeAtEachStep

In those cases in which the sensitivity computation does not need to be performed at each step (e.g., for linear elastic systems : subjected to static pushover analysis), the sensitivity computation may be performed only at the time/load steps required by

user:

sensitivityAlgorithm -computeByCommand

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However, before using the ‘-computeByCommand’ option, it is the user’s responsibility to make sure that the response sensitivities computation is not needed at each time/load step. For example, in case of incremental nonlinear FE analysis or dynamic analysis, using the ‘-computeByCommand’ option will produce wrong sensitivity results.