Dear all,
I am currently working on the analysis and data-driven modeling of floating offshore wind turbine (FOWT) systems, with particular focus on the coupled dynamics between platform motions and mooring line tensions.
As part of preprocessing and model development, I am seeking guidance on identifying the dominant physical frequency content of platform responses (surge, sway, heave, roll, pitch, and yaw) and corresponding mooring tensions, such that the essential structural and hydrodynamic dynamics of the system are preserved.
Specifically, I would appreciate insights on the following aspects:
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The typical frequency ranges that govern the primary physical behavior of floating platforms (e.g., low-frequency surge/sway, wave-frequency responses, and any higher-frequency contributions of practical importance).
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How these dominant frequencies translate into mooring line tension responses, particularly in terms of low-frequency drift, wave-frequency excitation, and potential coupling effects.
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Recommended cutoff frequencies or filtering strategies (if any) that are commonly adopted to retain physically meaningful dynamics while suppressing numerical noise or non-physical components.
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Any references, guidelines, or best practices—especially from OpenFAST or NREL-supported studies—that discuss frequency-domain characteristics of platform–mooring interaction.
Thanking you. I would be grateful for any recommendations or references you could share.
Best regards,
Kajal Thakur