Moment of inertia, data interpolation in OpenFast, linear added mass matrix, linear hydrostatic matrix

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Dear @Riad.Elhamoud,

Here are my responses to your questions:

  1. You must ensure that the hydrodynamic data in the potential-flow solution is provided at the reference point used by HydroDyn. As of OpenFAST v2.6 and newer, you can now specify the reference point for the hydrodynamic data in the potential-flow solution via HydroDyn inputs PtfmRefxt, PtfmRefyt, and PtfmRefzt (previously, these were assumed to be zero).
  2. I’m not sure what “data” you are referring to; please clarify.
  3. From which table in the report you reference are you referring to?
  4. As with (1), you must ensure that the hydrodynamic data in the potential-flow solution is provided at the reference point used by HydroDyn. This also applies to the hydrostatic matrix. But the hydrostatic data in the potential-flow solution should not depend on the vertical center of gravity of the structure because HydroDyn does not consider the body mass, which is accounted for elsewhere within OpenFAST.

Best regards,