Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS

Tomoaki Utsunomiya, Eiichi Watanabe, Tetsuya Hiraishi, Takatoshi Noguchi, Syuji Yamamoto

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

2 Citations (Scopus)

Abstract

This paper presents a hydroelastic analysis of pontoon-, semisubmersible-, and hybrid-type VLFS and its experimental validation. In the analysis, the detailed configuration of the experimental model is considered by using three dimensional finite element (FE) method. Experimental models measuring 15m in length, 3m in width and 0.03-0.23m in draft (depending on whether it is the pontoon and semisubmersible part) are built. The experiment has been made in the wave-basin with the bottom-slope of 1/75. At the same time, a hydroelastic analysis is carried out using the same models as the experimental ones in a wave-basin with flat as well as slanting bottom with slope of 1/75. By comparing the numerical results and experiment, the effect of bottom slope is verified. In the analysis of the semisubmersible part, the effect of viscous damping is considered by using the drag force formula with assumed drag force coefficient of 2.0. A comparison between the experiment and the analytical results indicates that numerical results from the semisubmersible part with additional effects of viscous damping agree better with the experimental results than those without. An experiment using irregular waves is also carried out and compared with the numerical predictions. Finally, the steady drift forces are analyzed using the far-field method and compared with the experiment.

Original languageEnglish
Title of host publication2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008
Pages723-732
Number of pages10
Volume3
DOIs
Publication statusPublished - 2008
Externally publishedYes
Event27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008 - Berlin, Germany
Duration: Jun 9 2008Jun 13 2008

Other

Other27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008
CountryGermany
CityBerlin
Period6/9/086/13/08

Fingerprint

Pontoons
Experiments
Drag
Damping
Finite element method

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Mechanical Engineering
  • Energy Engineering and Power Technology

Cite this

Utsunomiya, T., Watanabe, E., Hiraishi, T., Noguchi, T., & Yamamoto, S. (2008). Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS. In 2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008 (Vol. 3, pp. 723-732) https://doi.org/10.1115/OMAE2008-57101

Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS. / Utsunomiya, Tomoaki; Watanabe, Eiichi; Hiraishi, Tetsuya; Noguchi, Takatoshi; Yamamoto, Syuji.

2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008. Vol. 3 2008. p. 723-732.

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

Utsunomiya, T, Watanabe, E, Hiraishi, T, Noguchi, T & Yamamoto, S 2008, Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS. in 2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008. vol. 3, pp. 723-732, 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008, Berlin, Germany, 6/9/08. https://doi.org/10.1115/OMAE2008-57101
Utsunomiya T, Watanabe E, Hiraishi T, Noguchi T, Yamamoto S. Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS. In 2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008. Vol. 3. 2008. p. 723-732 https://doi.org/10.1115/OMAE2008-57101
Utsunomiya, Tomoaki ; Watanabe, Eiichi ; Hiraishi, Tetsuya ; Noguchi, Takatoshi ; Yamamoto, Syuji. / Experimental validation of hydroelastic analysis of pontoon-, semisubmersible-and hybrid-type VLFS. 2008 Proceedings of the 27th International Conference on Offshore Mechanics and Arctic Engineering, OMAE 2008. Vol. 3 2008. pp. 723-732
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