非定常波形解析による波浪中抵抗増加に関する流体力学的研究 (非線形波動現象の数理とその応用)
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- 柏木, 正
- 大阪大学
書誌事項
- タイトル別名
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- Hydrodynamic Study on Added Resistance by Means of Unsteady Wave Analysis (Mathematical aspects of nonlinear waves and their applications)
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抄録
It is known that the added resistance in waves can be computed from ship-generated unsteady waves through the unsteady wave-analysis method. In order to investigate the effects of nonlinear ship-generated unsteady waves and bluntness of the ship geometry on the added resistance, measurements of unsteady waves, wave-induced ship motions and added resistance are carried out using two different (blunt and slender) modified Wigley models. The ship-generated unsteady waves are also produced by the linear superposition using the waves measured for the diffraction and radiation problems and the complex amplitudes of ship motions measured for the motion-free problem in waves. Then a comparison is made among the values of the added resistance by the direct measurement using a dynamometer and by the wave-analysis method using the Fourier transform of measured and superposed waves. It is found that near the peak of the added resistance where ship motions become large, the degree of nonlinearity in the unsteady wave becomes prominent especially at the fore-front part of the wave. Thus the added resistance evaluated with measured waves at larger amplitude of incident wave becomes much smaller than the values by the direct measurement and by the wave analysis with superposed waves or measured waves at smaller amplitude of incident wave. Discussion is also made on the characteristics of the added resistance in the range of short incident waves.
収録刊行物
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- 数理解析研究所講究録
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数理解析研究所講究録 2153 1-11, 2020-04
京都大学数理解析研究所
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詳細情報 詳細情報について
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- CRID
- 1050004225379200512
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- NII論文ID
- 120006888415
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- NII書誌ID
- AN00061013
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- ISSN
- 18802818
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- HANDLE
- 2433/255081
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- 本文言語コード
- en
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- 資料種別
- departmental bulletin paper
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- データソース種別
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- IRDB
- CiNii Articles