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yang7857854 / F2A

F2A is an aero-hydro-servo-elastic tool developed based on AQWA by Yang Yang, a postdoctoral research associate in Liverpool John Moores University for performing fully coupled analysis of floating offshore wind turbines (FOWT). The aero-servo-elastic simulation capabilities are fully implemented within the user_force64.dll which is a built-in DLL of AQWA for external force calculation. For a coupled analysis of a floating offshore wind turbine subjected to wind, wave and current loadings, the aerodynamic loads acting on the rotor, the elastic responses of the blades and tower, and the servo-control are examined through the DLL, considering the influence from the platform motions. The platform position, velocity and acceleration at each degree of freedom are passed into the DLL to update the kinematics of the upper structures. Before being passed into DLL, these terms are transformed from the inertial coordinate system to the local coordinate system of the platform.
GNU General Public License v3.0
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Additional damping issue in aqwa #4

Open chyang994 opened 10 months ago

chyang994 commented 10 months ago

Dear Yang, I want to use F2A to calculate the float model I built, and I was confused when I got to this point: {ZN~QX1HO`{~RAH3YZ~6MCH I don't know how to calculate the additional damping in the graph. Have you any idea about? thanks for your work. Best regards.

yang7857854 commented 10 months ago

Hi,

You can use a critical damping instead. I do think that how to calculate the viscous damping has been described in quite a few books or thesis related.

Kind regards,

Yang

Yang Yang Ningbo University - Associate Professor +86-0574-87604348 @.*** 169 South Qixing Road, Ningbo Postcode: 315832 Web: hyxy.nbu.edu.cn/info/1178/10531.htm

---- Replied Message ---- | From | @.> | | Date | 1/22/2024 17:16 | | To | @.> | | Cc | @.***> | | Subject | [yang7857854/F2A] Additional damping issue in aqwa (Issue #4) |

Dear Yang, I want to use F2A to calculate the float model I built, and I was confused when I got to this point: ZN.QX1HO.RAH3YZ.6MCH.png (view on web) I don't know how to calculate the additional damping in the graph. Have you any idea about? thanks for your work. Best regards.

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chyang994 commented 10 months ago

Dear Yang， Thank you for your timely reply. I think I should learn some basics first, I'm trying to figure out this problem right now. Best regards