### Abstract

Language | English |
---|---|

Pages | 263-273 |

Number of pages | 11 |

Journal | Journal of Ship Research |

Volume | 52 |

Issue number | 4 |

Publication status | Published - Dec 2008 |

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### Keywords

- hydrodynamics
- model testing
- resistance
- naval engineering

### Cite this

*Journal of Ship Research*,

*52*(4), 263-273.

}

*Journal of Ship Research*, vol. 52, no. 4, pp. 263-273.

**Unsteady effects during resistance tests on a ship model in a towing tank.** / Doctors, Lawrence J.; Day, Alexander; Clelland, David.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Unsteady effects during resistance tests on a ship model in a towing tank

AU - Doctors, Lawrence J.

AU - Day, Alexander

AU - Clelland, David

PY - 2008/12

Y1 - 2008/12

N2 - It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been compared with experiment data obtained using a towing carriage the velocity history of which can be programmed. It is demonstrated here that generally excellent correlation exists between the theory and the experiments. In particular, one can predict the influence of Froude number, rate of acceleration, and type of smoothing of the acceleration on the characteristics of the oscillations. These characteristics include the amplitude, rate of decay, frequency, and phasing of the oscillations in the curve of wave resistance versus time.

AB - It is known that there are oscillations in the wave resistance during the constantvelocity phase of a towing-tank resistance test on a ship model. In this work, the unsteady thin-ship resistance theory has been applied to this case. The results have been compared with experiment data obtained using a towing carriage the velocity history of which can be programmed. It is demonstrated here that generally excellent correlation exists between the theory and the experiments. In particular, one can predict the influence of Froude number, rate of acceleration, and type of smoothing of the acceleration on the characteristics of the oscillations. These characteristics include the amplitude, rate of decay, frequency, and phasing of the oscillations in the curve of wave resistance versus time.

KW - hydrodynamics

KW - model testing

KW - resistance

KW - naval engineering

UR - http://www.ingentaconnect.com/content/sname/jsr/2008/00000052/00000004/art00003;jsessionid=6dnlo64rn8t6j.alice

M3 - Article

VL - 52

SP - 263

EP - 273

JO - Journal of Ship Research

T2 - Journal of Ship Research

JF - Journal of Ship Research

SN - 0022-4502

IS - 4

ER -