You need JavaScript to view this

Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku

Abstract

Steady-state drift force in regular waves is theoretically analyzed. It is also studied under combined external force experimentally using a two-dimensional water tank. The fluid forces are analyzed by the pressure distribution method based on the potential theory, in which the effects of water depth are taken into account to discuss the effects of elastic deformation of the floating structure on the drift characteristics of steady-state waves. The tests were carried out using a wave-making circulating water tank equipped with a wind duct to create wind, waves and tidal flow. Drift force under a combined external force by wind, wave and/or tidal flow cannot be accurately predicted by arithmetically adding these components. For predicting drift force by tidal flow, it is necessary to take into account drag force in current at the floating structure bottom as well as that in wind at the front face. Drift force by tidal flow is affected by shallowness of water, which should be taken into account for drag forces. The floating structure will be deformed along the wave face as its stiffness decreases, basically decreasing steady-state drift force. 9 refs., 14 figs.
Authors:
Maeda, H; Miyajima, S; [1]  Masuda, K; Ikoma, T [2] 
  1. The University of Tokyo, Tokyo (Japan). Institute of Industrial Science
  2. Nihon University, Tokyo (Japan). College of Science and Technology
Publication Date:
Dec 31, 1996
Product Type:
Miscellaneous
Report Number:
ETDE/JP-mf-97744282
Reference Number:
SCA: 423000; 320204; PA: NEDO-96:915529; EDB-97:074929; SN: 97001783073
Resource Relation:
Other Information: PBD: Aut 1996; Related Information: Is Part Of Preprint of the Fall 1996 Meeting of the Society of Naval Architects of Japan; PB: 406 p.; Nippon zosen gakkai (1996 nen) shuki koen ronbun maezuri
Subject:
42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; MECHANICAL STRUCTURES; FLOTATION; SEAS; BENCH-SCALE EXPERIMENTS; WIND; TIDE; NUMERICAL ANALYSIS; POTENTIAL FLOW; WAVE FORCES; PRESSURE DROP
OSTI ID:
473716
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE97744282; TRN: 96:915529
Availability:
Available from The Society of Naval Architects of Japan, 15-16, Toranomon 1-chome, Minato-ku, Tokyo, Japan; OSTI as DE97744282
Submitting Site:
NEDO
Size:
pp. 365-371
Announcement Date:

Citation Formats

Maeda, H, Miyajima, S, Masuda, K, and Ikoma, T. Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku. Japan: N. p., 1996. Web.
Maeda, H, Miyajima, S, Masuda, K, & Ikoma, T. Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku. Japan.
Maeda, H, Miyajima, S, Masuda, K, and Ikoma, T. 1996. "Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku." Japan.
@misc{etde_473716,
title = {Hydroelastic responses of pontoon type very large floating offshore structures. 2nd Report. Effect of the water depth and the drift forces; Pontoon gata choogata futaishiki kaiyo kozobutsu no harochu chosei oto ni kansuru kenkyu. 2. Senkai eikyo to hyoryuryoku}
author = {Maeda, H, Miyajima, S, Masuda, K, and Ikoma, T}
abstractNote = {Steady-state drift force in regular waves is theoretically analyzed. It is also studied under combined external force experimentally using a two-dimensional water tank. The fluid forces are analyzed by the pressure distribution method based on the potential theory, in which the effects of water depth are taken into account to discuss the effects of elastic deformation of the floating structure on the drift characteristics of steady-state waves. The tests were carried out using a wave-making circulating water tank equipped with a wind duct to create wind, waves and tidal flow. Drift force under a combined external force by wind, wave and/or tidal flow cannot be accurately predicted by arithmetically adding these components. For predicting drift force by tidal flow, it is necessary to take into account drag force in current at the floating structure bottom as well as that in wind at the front face. Drift force by tidal flow is affected by shallowness of water, which should be taken into account for drag forces. The floating structure will be deformed along the wave face as its stiffness decreases, basically decreasing steady-state drift force. 9 refs., 14 figs.}
place = {Japan}
year = {1996}
month = {Dec}
}