Dear Jason,
I am trying to compute the second-order forces on OC4 semisubmersible using the full QTFs provided by NREL as a benchmark. (5MW_OC4Semi_WSt_WavesWN)
- I was wondering do the QTFs are created for the sea state in the test files. (Hs=1.2646 m, Tp=10 s and Wind Speed =Steady 8m/s)
- Hydrodynamic analysis of OC3-Hywind spar buoy - #44 by Jason.Jonkman In this post, you provided the wamit files for the computations of the second order OC4 model, does this model also constructed for the same environmental parameters? (Mass and stiffness matrix)
- To obtain mass and stiffness matrix, do I need to linearize the system with the 6 platform DOFs enabled in the same environmental conditions? (Hs=1.2646 m, Tp=10 s and Wind Speed =Steady 8m/s) When I try this, Openfast 3.0 cannot find a steady solution when CalcSteady is true. Or is it okay if I linearize without waves?
Best regards,