OpenFAST
free decay and hydrodyn damping
Dear All When I model a wind turbine with 14 degrees of freedom, is it not also necessary to consider the additional damping and additional stiffness of the platform (generated by radiation action) when observing the free decaying motion of the platform. I hope to get replies from all of you, thank you very much!
Dear @HANloading,
I'm not sure I really understand your question. Please clarify.
Best regards,
When I model a wind turbine with 14 degrees of freedom, is it not also necessary to consider the additional damping and additional stiffness of the platform (generated by radiation action) when observing the free decaying motion of the platform. I hope to get replies from all of you, thank you very much! Dear @jjonkman Sorry, I didn't make my question clear. When I study the free decay of the platform, should I consider the damping effect of external loads on the platform, such as oscillation-frequency-dependent hydrodynamic damping matrices. I hope I have expressed myself clearly this time. Thank you again.
Dear @HANloading,
I would generally expect that the damping of free-decay motion of a floating offshore wind turbine would be impacted by viscous drag for the initial large-amplitude cycles and by radiation damping for the later low-amplitude cycles.
Best regards,