Dear all,
I have a full system mass matrix of OC4 semisubmersible turbine.
Is there any way to find the mass matrix associated with mooring line from this full system matrix ?
Also is there any manual way of finding the mooring line mass matrix ?
Best regards,
Kajal Thakur
Dear @Kajal.Thakur,
Can you clarify your intent? It is common in some situations to assume that a floating offshore wind turbine is rigid, but this would never be a good assumption for a mooring system, which never acts as a rigid body.
Best regards,
Dear @Jason.Jonkman ,
I just want to see the contribution of mooring line mass in whole system mass matrix.
Best regards
Dear @Kajal.Thakur,
MoorDyn does not have the ability to treat the system rigidly, so, I’m not aware of any way for MoorDyn to output its equivalent rigid-body mass matrix.
Perhaps someone more experienced with MoorDyn can correct me.
Best regards,
Hi @Kajal.Thakur, Jason is right there is no way to output the mooring system mass matrix from MoorDyn because it does not exist. Each mooring line is simulated as a lumped mass model, with the dynamics and mass of each lumped mass calculated separately. If you are looking for a linearized mooring model OpenFAST has Map++ available.