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245 ©2023 ANSYS, Inc. Moonpool Analysis in Hydrodynamic Diffraction (HD) • Moonpools are openings through ships measuring from the deck to the keel, which facilitate easy and safe access to water. • Large water column motion inside moonpools near resonant frequency may affect structures. • Multi-fluid region matching approach is employed in HD. • Fluid pressure depends on RAOs of the pre-described pressure modes on the mean water level and incident/diffraction/radiation waves. • Moonpool hull surfaces, matching surfaces, and inside free surfaces are modeled by Geometry (DM/SPCM). • Hydrostatic and hydrodynamic properties of Moonpool pressure modes are presented by HD. Large Water Column Motion at Resonant Frequency Moonpool Definition