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Maneuvering behavior of ships in irregular waves

Maneuvering behavior of ships in irregular waves

Category
Academic chapter/article/Conference paper
Abstract
Ship maneuvering in waves is analyzed by using a unified seakeeping and maneuvering two-time scale model in irregular sea that has been applied by Skejic and Faltinsen [1] for regular waves. The irregular wave effects are accounted for by Newman’s [2] approximation of the slow-drift 2nd order wave loads valid for deep water (Faltinsen [3], Pinkster [29]).

The modular type maneuvering model (MMG model) based on Söding’s [4] nonlinear slender-body theory is used for the maneuvering analysis. Forces and moments due to rudder, propeller, and viscous cross-flow are accounted for as presented by Skejic and Faltinsen [1] and Yasukawa [5, 6]. In particular, the behavior of the propulsive coefficients (the thrust deduction and wake fraction) in waves (Faltinsen et al. [7], Faltinsen and Minsaas [8]) are discussed from the perspective of ship maneuvering characteristics in both regular and irregular wave environments.

The unified model of seakeeping and maneuvering for deep-water irregular waves is validated for the ‘S7-175’ (‘SR 108’) container ship in calm water and regular deep-water wave scenarios by comparison with experimental results by Yasukawa [5, 6]. The maneuvering model is applied to a ‘MARINER’ ship performing turning maneuver in irregular waves. The obtained results of the ships main maneuvering parameters are discussed from a statistical point of view.
Language
English
Author(s)
Affiliation
  • SINTEF Ocean / Skip og havkonstruksjoner
  • Norwegian University of Science and Technology
Year
Publisher
The American Society of Mechanical Engineers (ASME)
Book
32nd International Conference on Ocean, Offshore and Arctic Engineering Odd M. Faltinsen Honoring Symposium on Marine Hydrodynamics
Issue
9
ISBN
978-0-7918-5543-0