Mooring Force Analysis Methods …with Application to Breakaways Caused by Passing Vessels Jennifer K. Waters, Ph.D., P.E. Associate Professor Dept of Naval Architecture & Ocean Engineering U.S. Naval Academy Annapolis, MD
Overview Purpose Background USCG MC Incident Data Findings from Actual Cases Discussion Conclusions Acknowledgements
The Phenomenon Ship 1 Moored Pier or Wharf
V
Mx
Ship 2 Moving
F
Y+
F
X-
Why Develop & Study Mooring Forces Methods? Design of Navigation Channels Reducing Marine Casualty Incidents (and Consequences)
Motivation and Purpose of Project Deep-Draft navigation channel congestion
Traffic Blockage Ship berths in close proximity to transiting vessels
Tasked to investigate occurrences of vessel mooring breakaways due to passing vessels
Frequency; Locations Characteristics & preliminary analysis of events
Mooring Force Analysis Methods Numerical Analytical Physical
Experimental / Model-Scale Full-Scale
Evidentiary or “Forensic”
Background Literature Review
Navy MIL- HDBK 1026/4: Mooring Design Handbook (repl. NAVFAC DM 26.4) MIL-HDBK 1025/1: Piers and Wharves DM 26.6: Mooring Design Physical and Empirical Data TR-6005-OCN: ‘EMOOR’ - A Planning/Preliminary Design Tool for Evaluating Ship Moorings at Piers and Wharves
USACE EM 1110-2-1100 (Part II): CEM Harbor Hydrodynamics
Literature Review (cont’d)
Essential Reference Guidelines and Recommendations for the Safe Mooring of Large Ships at Piers and Sea Islands, Oil Companies International Marine Forum (OCIMF) Proceedings, North Atlantic Treaty Organization (NATO) Advanced Study Institute on Analytical Treatment of Problems of Berthing and Mooring Ships (Lisbon, Portugal, 1965), Published by ASCE 1970 NATO-ASI Advances in Berthing and Mooring of Ships and Offshore Structures, Trondheim, Norway, 1987, E. Bratteland, ed. Design of Marine Facilities, J. Gaythwaite, 1990 Port Engineering, P. Bruun Handbook of Port & Harbor Engineering, G. Tsinker
Seelig (2001), Flory (2001), Lean and Price (1977), King (1977) Wang(1975), Muga and Fang (1975), Remery (1974)
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