Use the Harmonic Perturbation subnode to specify the harmonic part of nonzero prescribed displacements. This node is used if the study step is frequency response of a perturbation type.

The settings are the same as in the parent Prescribed Displacement/Rotation, Prescribed Velocity, Prescribed Acceleration, or Rigid Connector node. Only degrees of freedom selected as prescribed in the parent node can be assigned a value.

 Shell>Prescribed Displacement/Rotation>Harmonic Perturbation
 Shell>Prescribed Velocity>Harmonic Perturbation
 Shell>Prescribed Acceleration>Harmonic Perturbation
 Shell>Rigid Connector>Harmonic Perturbation
 Plate>Prescribed Displacement/Rotation>Harmonic Perturbation
 Plate>Prescribed Velocity>Harmonic Perturbation
  Plate>Prescribed Acceleration>Harmonic Perturbation

Physics tab with Prescribed Displacement/Rotation, Prescribed Velocity, Prescribed Acceleration, or Rigid Connector node selected in the model tree:
Attributes>Harmonic Perturbation