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How to set the appropriate value of hydro stiffness
Hello
Now, I try to make a spar of floating VAWT model.
When we make a spar in QBlade, we should have to set the value of hydro stiffness.
However, I couldn’t understand how to calculate the value of it although I read QBlade documentation.
Could you give me your advice on how to determine the value of hydro stiffness.
Koma
Hi Koma,
you dont necessarily need to model the hydrodynamic restoring force/moment with the “linear hydrodynamic stiffness” approach but you could use the “explicit buoyancy” option. A linear hydrodynamic stiffnes matrix is commonly obtained from a linear potential flow solver such as WAMIT, NEMOH or ANSYS AQWA.
See the following section in the docs for an overview of the different modeling options for a substructure in QBlade:
BR,
David
Thank you, David. Your explanation really helped. Now I understand about the setting of the hydrodynamic restoring force/moment better.
Best Regards,
Koma
