Seakeeping Comparison of FPSO Hulls with and Without a Moonpool at Forward Speed

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@article{1723711,
      author = {Serah Vincent, Charles U. Orji, Inegiyemiema Morrison},
      title = {Seakeeping Comparison of FPSO Hulls with and Without a Moonpool at Forward Speed},
      journal = {Iconic Research And Engineering Journals},
      year = {2026},
      volume = {10},
      number = {4},
      pages = {1021-1031},
      issn = {2456-8880},
      url = {https://www.irejournals.com/formatedpaper/1723711.pdf},
      abstract = {Moonpool openings can alter vessel motions through interactions between the external wave field, hull motion and the enclosed water column. This study compares two floating production, storage and offloading hull configurations, with and without a moonpool, at a reported speed of 13.45 knots and wave headings of 90°, 120° and 150°. A frequency-domain formulation is established, and reported response amplitude operator and added-resistance summaries are analysed using midpoint comparisons and interval arithmetic. The moonpool configuration has reported heave response levels of 1.75–1.80, 1.25–1.30 and 0.80–0.85 at the three headings, respectively. Corresponding values for the configuration without a moonpool are 1.30–1.35, approximately 1.00 and 1.05–1.08. Midpoint comparisons indicate heave increases of approximately 34.0% and 27.5% at 90° and 120°, followed by a 22.5% decrease at 150°. The reported added-resistance ordinate is lower for the moonpool configuration at all three headings, with midpoint reductions of approximately 52.1%, 81.4% and 93.7%. These comparisons are preliminary: the dataset contains approximate response summaries, and common displacement, response normalization and numerical convergence are not established. The results identify a heading-dependent motion trade-off rather than a universal benefit from adding a moonpool. Verification of the resistance normalization, hull loading conditions and moonpool damping is required before extrapolating these trends to propulsion demand or stationary offshore operation.},
      keywords = {FPSO; moonpool; seakeeping; response amplitude operator; wave heading; added resistance},
      month = {October},
  }