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Advances in Floating Systems – Design, Monitoring, and Integrity Management

Wednesday, 6 May
Room 600
Technical Session
This session highlights groundbreaking developments in mooring technology, design optimization, and integrity management in the offshore industry. Presentations span the full lifecycle of mooring systems—from conceptual design and installation to real-time monitoring, inspection, and replacement. Presentations include industry’s first full mooring system replacement on a deepwater spar in the Gulf of Mexico, demonstrating innovative offshore execution and life-extension strategies; exploration of the next generation of FPSO hull and marine systems designed to enable remote or unmanned operations, supported by new hull concepts that minimize manual inspection and maintenance. Advancements in digital twins and data-driven modeling are highlighted through a hybrid digital twin approach for predicting mooring line fatigue, merging motion-based simulations with machine learning to improve cumulative damage estimation. Complementary studies examine extreme loads and fatigue mechanisms, including insights from scaled dynamic tank tests on out-of-plane (OPB) and in-plane (IPB) bending stresses, as well as the influence of biofouling on drag coefficients of mooring chains. The session also introduces innovative tools and methodologies—such as derivative-free optimization using surrogate modeling and an advanced ROV system for in-situ inspection and repair—to enhance mooring integrity, reliability, and operational safety in an increasingly digital and autonomous offshore environment.
Chairperson(s)
Manoj Jegannathan, Project Manager - Major Capital Projects & Decommissioning - Occidental Petroleum Corp.
Peter Leitch, Senior Project Manager - Aker Solutions
Sponsoring Society:
  • Society of Naval Architects and Marine Engineers (SNAME)
  • 0930-0948 36935
    Enabling FPSO Hull and Marine Design for Remote Operations
    G. Singhal, M.A. Danaczko, Wood Group USA Inc; L. Garcia, John Wood Group PLC; G. Silva, A. Carre de Oliveira, R. Alkmin Freire, M. Costa De Oliveira, L. Pereira Gomes Neto, C. De Miranda Nascimento, Petrobras; I. Esteves, T. Bergan, John Wood Group PLC
  • 0950-1008 37025
    A New FPSO Hull Concept Supporting Unmanned Inspection and Maintenance
    M. Moczulski, ExxonMobil Upstream Company; A. Baquet, D. DeBroeck, ExxonMobil Technology and Engineering Company; D. Lebreux, SeaRiver Maritime Inc.; P. Szalewski, DNV Houston, USA
  • 1010-1028 36939
    Extreme Loads and Fatigue Damage During Installation and Retrieval of Drag Anchors
    K. Nilsen, Delmar Systems AS; M. Valen, Equinor ASA; J. Bergsvik, Delmar Systems AS
  • 1030-1048 36932
    OPB and IPB Stress Effects on Mooring Chain Fatigue Life: Insights from Scaled Dynamic Tank Tests
    Y. Mizushima, The University of Tokyo; Y. Higuchi, ClassNK; M. Takaoka, R. Wada, The University of Tokyo
  • 1050-1108 37148
    Drag Coefficients of a Mooring Chain Link under Mussel Biofouling in Uniform Currents
    N. Emamdoost, M. Hasan, Department of Mechanical & Industrial Engineering, University of Massachusetts Amherst; F. Schoefs, Sea and Littoral Research institute (IUML); K. Thiagarajan, Department of Mechanical & Industrial Engineering, University of Massachusetts Amherst
  • 1110-1128 36968
    Enhancing Mooring Integrity With an Advanced ROV System for Inspection and Repair
    F.H. Costa Filho, Buyl Engineering
  • 1130-1148 37154
    The Effect of Nonlinear Pile-Soil Interaction on Dynamic WTG Fixed Foundation Analyses
    G. McDonald, Bentley Systems; A. Gupta, WSP USA; M. Eslaminia, Bentley Systems; A. Desai, S. Sarada, WSP USA

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