PSI - Issue 48
Nurman Firdaus et al. / Procedia Structural Integrity 48 (2023) 58–64 Firdaus et al. / Structural Integrity Procedia 00 (2023) 000–000
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Fig. 2. The validation results: (a) surge added mass; (b) surge damping radiation; (c) heave added mass; (d) heave damping radiation; (e) pitch added mass; and (f) pitch damping radiation. 5. Conclusions Numerical calculation for hydrodynamic coefficients and motion characteristics of spar-FOWT platform using open source BEM-Solver NEMOH has been performed to determine the effect of changes in the FOWT floater geometry as a reference for design optimization. The configuration of the BEM model in this study was validated with the output of previous research publications on the OC3-Hywind platform design to ensure a numerical accuracy. According to the comparison of six parameters, i.e., surge, heave and pitch motions which each them is categorized based on added mass and damping radiation, the results showed good agreement among different BEM code calculations, which is pioneer work compared to the current results. The highest disparities are found in pitch damping radiation on ω equals to 1.2 to 2.1 rad/s. Nevertheless, for all assessed six parameters indicated high similarity in terms of value pattern in range of ω equals to 0 to 3.0 which maximum differences is approximated below 5%. The next work is planned to conduct a series of parametric study to apply the verified methodology in this work to analyse motion behaviours of several tower designs during operational conditions. Acknowledgements This work is part of the research activity “Offshore Wind Turbine development as a power generating system: prototype testing” research grand DIPA-124.01.1.690505/2023 conducted by the Marine Renewable Energy Conversion Technology research group, Research Centre for Hydrodynamics Technology, National Research and
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