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Time Domain Comparison With Experiments for Ship Motions and Structural Loads on a Container Ship in Abnormal Waves

[+] Author Affiliations
Suresh Rajendran, Nuno Fonseca, C. Guedes Soares

Technical University of Lisbon, Lisboa, Portugal

Günther F. Clauss, Marco Klein

Technical University of Berlin, Berlin, Germany

Paper No. OMAE2011-50316, pp. 919-927; 9 pages
doi:10.1115/OMAE2011-50316
From:
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 6: Ocean Engineering
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4438-0
  • Copyright © 2011 by ASME

abstract

The paper presents experimental results from model tests with a containership advancing in abnormal wave conditions and comparisons with numerical simulations. A nonlinear time domain method based on strip theory is used for the calculation of vertical ship responses induced by abnormal waves. This code combines the linear diffraction and radiation forces with dominant nonlinear forces associated with vertical response arising from Froude-Krylov forces, hydrostatic forces and shipping of green water. The time domain simulations are compared directly with experimental records from tests with a model of a container ship in deterministic waves for a range of Froude numbers. Extreme sea conditions were replicated by the reproduction of realistic abnormal waves like the New Year Wave and abnormal wave from North Alwyn. Head sea condition is considered and the comparisons include the wave elevation, the vertical motions of the ship and the vertical bending moment at midship.

Copyright © 2011 by ASME
Topics: Containers , Motion , Stress , Waves , Ships

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