Nonlinear wave loads on a ship advancing in waves

Ming-Chung Fang, Cheng Ming Liao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Based on the strip theory, a method for predicting the nonlinear wave loads of a ship advancing in large oblique waves is proposed in the paper. With the previous well progress in the hydrodynamics, the hydrodynamic coefficients and forces can be well estimated. Therefore in the study, the authors consider the ship as a free-free beam and use the simple beam theory to estimate the corresponding sea loads along the ship hull, e.g. wave bending moment, shear force and torsion moment at any ship section. The numerical solutions for the linear analysis in frequency domain are firstly made and the accuracy has been verified by comparing with the existing experimental data and theory done by others. With the well developed linear theory, the analytical model of the nonlinear wave loads for a ship in large oblique waves are further developed The time domain analyses including the instant grid generation technique (IGGT) for the corresponding sea loads are made. Besides, to avoid the numerical drift phenomena in the sway and yaw mode motion, the Artificial Restoring Force Technique (ARFT) and Digital Filter Technique (DFT) are applied to solve five coupled equations of motions. A series of analyses are made in the paper and some valuable suggestions are also submitted, which will be helpful for the researchers to do the related works. The calculation procedures developed here may be considered as a useful analytical tool for predicting the ship motions and wave induced loads.

Original languageEnglish
Title of host publicationProceedings of the International Offshore and Polar Engineering Conference
EditorsJ.S. Chung, C.H. Kim, M. Olagnon, S. Naito
PublisherInt Soc of Offshore and Polar Engineerns (ISOPE)
Pages552-558
Number of pages7
Volume3
Publication statusPublished - 1997
EventProceedings of the 1997 7th International Offshore and Polar Engineering Conference. Part 3 (of 4) - Honolulu, HI, USA
Duration: 1997 May 251997 May 30

Other

OtherProceedings of the 1997 7th International Offshore and Polar Engineering Conference. Part 3 (of 4)
CityHonolulu, HI, USA
Period97-05-2597-05-30

Fingerprint

Ships
Hydrodynamics
Bending moments
Digital filters
Torsional stress
Equations of motion
Analytical models

All Science Journal Classification (ASJC) codes

  • Ocean Engineering

Cite this

Fang, M-C., & Liao, C. M. (1997). Nonlinear wave loads on a ship advancing in waves. In J. S. Chung, C. H. Kim, M. Olagnon, & S. Naito (Eds.), Proceedings of the International Offshore and Polar Engineering Conference (Vol. 3, pp. 552-558). Int Soc of Offshore and Polar Engineerns (ISOPE).
Fang, Ming-Chung ; Liao, Cheng Ming. / Nonlinear wave loads on a ship advancing in waves. Proceedings of the International Offshore and Polar Engineering Conference. editor / J.S. Chung ; C.H. Kim ; M. Olagnon ; S. Naito. Vol. 3 Int Soc of Offshore and Polar Engineerns (ISOPE), 1997. pp. 552-558
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Fang, M-C & Liao, CM 1997, Nonlinear wave loads on a ship advancing in waves. in JS Chung, CH Kim, M Olagnon & S Naito (eds), Proceedings of the International Offshore and Polar Engineering Conference. vol. 3, Int Soc of Offshore and Polar Engineerns (ISOPE), pp. 552-558, Proceedings of the 1997 7th International Offshore and Polar Engineering Conference. Part 3 (of 4), Honolulu, HI, USA, 97-05-25.

Nonlinear wave loads on a ship advancing in waves. / Fang, Ming-Chung; Liao, Cheng Ming.

Proceedings of the International Offshore and Polar Engineering Conference. ed. / J.S. Chung; C.H. Kim; M. Olagnon; S. Naito. Vol. 3 Int Soc of Offshore and Polar Engineerns (ISOPE), 1997. p. 552-558.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Fang M-C, Liao CM. Nonlinear wave loads on a ship advancing in waves. In Chung JS, Kim CH, Olagnon M, Naito S, editors, Proceedings of the International Offshore and Polar Engineering Conference. Vol. 3. Int Soc of Offshore and Polar Engineerns (ISOPE). 1997. p. 552-558