Dynamically imposing forces on a floating platform

Wind & Water Computer-Aided Engineering Software Tools
1

Hello!

I am trying to run a simulation for a floating wind turbine. Now, I have the force applied to the platform as a list of parameters at each point in time, written in a file:

!Loading and Wave Elevation

!Dimension: 1 time column - 6 force columns

0.000 0.000 0.000 0.000 0.000 0.000 0.000

0.100 0.000 0.000 0.000 0.000 62830199416763.000 0.000

0.200 0.000 0.000 0.000 0.000 125650477216687.000 0.000

… (more time steps follow)

Is there a way to impose the forces dynamically, during the execution of the program, with live data taken from a sensor on the platform? In other words, can I increase the number of lines while OpenFAST is running, instead of loading them all in a pre-written file?

2

Dear @Tudor.Istrate,

The StC_DOF_MODE = 4 option of the Structural Control (StC) submodel of ServoDyn supports user-prescribed load (force, moment) time series at arbitrary locations in the blades, nacelle, tower, and substructure of an OpenFAST model. However, these loads must be pre-computed and fully prescribed at model initialization.

That said, the StC_DOF_MODE = 5 option allows your DISCON controller to specify the loads directly through the controller library, which you could compute based on feedback from other response signals. This option would require customization of your DISCON controller.

Best regards,