Parameter Variation

1. Variations

The static offset, current and specified force can be loaded incrementally. They are selected by ticking off the checkboxes:

  • Static offset

  • Current

  • Specified Force

Per default current is activated in the first load step of the variation. Note that this only affect lines in the slender system. This can be deactivated using:

  • Deactivate current

The parameters are added incrementally by using the common parameters variation settings

  • Num variations : Number of variations

  • Max iteration : Maximum number of iterations

  • Convergence Norm : Convergence Norm

    • Displacement : Use the default Euclidean displacement norm only

    • Both : Use both the default Euclidean displacement norm and the energy norm

  • Accuracy for the displacement norm

  • Energy accuracy for the energy norm

1.1. Offset variation

  • Reference type: reference to moving point

    • Super node : super node identifier

    • Support vessel : Support vessel ID

  • DX: Displacement increment, X-direction

  • DY: Displacement increment, y-direction

  • DZ: Displacement increment, z-direction

  • Rotation code: Rotation code

    • No rotation

    • Rotation about x-axis: The given rotation is taken about X-axis

    • Rotation about y-axis: The given rotation is taken about Y-axis

    • Rotation about z-axis: The given rotation is taken about Z-axis

    • Rotation increment

1.2. Current variation

  • Velocity increment : Current velocity increment

  • Direction increment : Current direction increment

1.3. Specified force variation

Option to vary the loads specified in Load components

  • Specified force variation : Force increment on specified forces

2. Load type activation

  • Friction : Activate bottom friction forces

  • Global spring : Activate global and geotechnical springs

  • Material memory : Activate material memory formulation (Isotropic/kinematic hardening)

2.1. Boundary change activation

The options are

  • Type : Super node or node

  • Boundary change option: Options are Free , Fixed or prescribed or slave

    • Free: Select the node . All dofs are freed.

    • Fixed or prescribed :

      • Select the node. Specify the boundary conditions for all dofs.

      • Optional: Attach a support vessel to the node

    • Slave : Specify the node and select the master node.