The effect of steady flow potential on the ship motions in waves

Ming-Chung Fang, P. Y. Liao

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

Abstract

A three-dimensional method for predicting the motions of a ship running in waves is presented. Basically the method developed here is based on the source distribution technique and the general formulations include the effect of steady flow and unsteady flow. Three algorithms are used for treating the corresponding Green functions and derivatives, i.e. (1) The Hess and Smith algorithm for the part of simple source l/r. (2) The complex plane contour integral of Shen and Farell algorithm for the Double integral of steady flow. (3) The series expansions of Telste and Noblesse algorithm for the Cauchy principal value integral of unsteady flow. The steady flow potential is especially considered in the calculations of diffraction and radiation problems, and effects on ship motions are discussed. The results indicate that the effect of steady flow is generally small, but still cannot be neglected in some cases especially for long waves. It is also interesting to find that the steady flow effect depends on the fore-aft configuration of the ship.

Original languageEnglish
Title of host publicationProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999
EditorsJ S Chung, M Olagnon, C H Kim, A Francescutto, J S Chung, M Olagnon, C H Kim, A Francescutto
PublisherInternational Society of Offshore and Polar Engineers
Pages621-628
Number of pages8
ISBN (Print)1880653427
Publication statusPublished - 1999
EventProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference - Brest, France
Duration: 1999 May 301999 Jun 4

Other

OtherProceedings of the 1999 Ninth International Offshore and Polar Engineering Conference
CountryFrance
CityBrest
Period99-05-3099-06-04

Fingerprint

ship motion
steady flow
Steady flow
Ships
unsteady flow
Unsteady flow
Green function
Green's function
diffraction
Diffraction
effect
Derivatives
Radiation

All Science Journal Classification (ASJC) codes

  • Earth and Planetary Sciences(all)
  • Engineering(all)
  • Environmental Science(all)

Cite this

Fang, M-C., & Liao, P. Y. (1999). The effect of steady flow potential on the ship motions in waves. In J. S. Chung, M. Olagnon, C. H. Kim, A. Francescutto, J. S. Chung, M. Olagnon, C. H. Kim, ... A. Francescutto (Eds.), Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999 (pp. 621-628). International Society of Offshore and Polar Engineers.
Fang, Ming-Chung ; Liao, P. Y. / The effect of steady flow potential on the ship motions in waves. Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999. editor / J S Chung ; M Olagnon ; C H Kim ; A Francescutto ; J S Chung ; M Olagnon ; C H Kim ; A Francescutto. International Society of Offshore and Polar Engineers, 1999. pp. 621-628
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Fang, M-C & Liao, PY 1999, The effect of steady flow potential on the ship motions in waves. in JS Chung, M Olagnon, CH Kim, A Francescutto, JS Chung, M Olagnon, CH Kim & A Francescutto (eds), Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999. International Society of Offshore and Polar Engineers, pp. 621-628, Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference, Brest, France, 99-05-30.

The effect of steady flow potential on the ship motions in waves. / Fang, Ming-Chung; Liao, P. Y.

Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999. ed. / J S Chung; M Olagnon; C H Kim; A Francescutto; J S Chung; M Olagnon; C H Kim; A Francescutto. International Society of Offshore and Polar Engineers, 1999. p. 621-628.

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

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Fang M-C, Liao PY. The effect of steady flow potential on the ship motions in waves. In Chung JS, Olagnon M, Kim CH, Francescutto A, Chung JS, Olagnon M, Kim CH, Francescutto A, editors, Proceedings of the 1999 Ninth International Offshore and Polar Engineering Conference (Volume 3), Brest, France, 30 May - 4 June 1999. International Society of Offshore and Polar Engineers. 1999. p. 621-628