Journal
APPLIED OCEAN RESEARCH
Volume 67, Issue -, Pages 78-93Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apor.2017.07.005
Keywords
Hydroelasticity theory; Segmented model experiment; Oblique wave; PID; Nonlinear wave loads; Slamming
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Real sea conditions are characterized by multidirectional sea waves. However, the prediction of hull load responses in oblique waves is a difficult problem due to numeral divergence. This paper focuses on the investigation of numerical and experimental methods of load responses of ultra-large vessels in oblique regular waves. A three dimensional nonlinear hydroelastic method is proposed. In order to numerically solve the divergence problem of time-domain motion equations in oblique waves, a proportional, integral and derivative (PID) autopilot model is applied. A tank model measurement methodology is used to conduct experiments for hydroelastic responses of a large container ship in oblique regular waves. To implement the tests, a segmented ship model and oblique wave testing system are designed and assembled. Then a series of tests corresponding to various wave headings are carried out to investigate the vibrational characteristics of the model. Finally, time-domain numerical simulations of the ship are carried out. The numerical analysis results by the presented method show good agreement with experimental results. (C) 2017 Elsevier Ltd. All rights reserved.
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