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Lookup NU author(s): Dr Xin WangORCiD
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).
In modern shipbuilding industry, accurate numerical prediction of ship motions in large waves has become necessary and important for hull form and structural design. In this paper, with the aim of providing a practical tool for design process, a weakly nonlinear time-domain method using impulse response function is presented. In this method, the frequency-domain solver is based on a Rankine panel method with double-body basis flow. The ship motions solution is obtained in time domain using convolution integral to account for the memory effects related to the free surface oscillations. Forces due to radiation and scattering potentials are calculated on mean wetted surface of the ship hull while the Froude-Krylov and hydrostatic forces are evaluated over the instantaneous wetted surface. To validate this method, the vertical motions of two hull forms advancing in head seas are studied. A modified Wigley model and a bulker carrier model are used. In small waves, the results of the current method coincide with conventional linear theories. In large wave conditions, the calculation results show good agreement with model tests results.
Author(s): Wang X, Kashiwagi M
Publication type: Conference Proceedings (inc. Abstract)
Publication status: Published
Conference Name: 13th International Symposium on Practical Design of Ships and Other Floating Structures (PRADS’16)
Year of Conference: 2016
Acceptance date: 31/05/2016
Date deposited: 31/07/2017
Publisher: Technical University of Denmark
Library holdings: Search Newcastle University Library for this item
ISBN: 9788774754732
