## 抄録

A new approach to investigate the hydrodynamic forces acting on a vertical cylinder in random waves is presented. The time series of random wave force is obtained from numerical simulation of a two-dimensional irregular oscillating flow around a circular cylinder by numerical solution of the incompressible Navier-Stokes equation expressed in a generalized coordinate system through the use of MAC method. The random waves are chosen from laboratory experimental data. To obtain the Morrison force coefficients, two methods are used: least squares fit of total force time series and least squares fit on a wave-by-wave basis. The phenomena found in calculated results are similar to those in the experiments, and the study revealed that the so-called history effect of random wave forces is mainly due to the vortex shedding, which is confirmed by computed flow patterns.

本文言語 | 英語 |
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ホスト出版物のタイトル | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference |

出版社 | Publ by Int Soc of Offshore and Polar Engineerns (ISOPE) |

ページ | 136-142 |

ページ数 | 7 |

ISBN（印刷版） | 1880653087 |

出版ステータス | 出版済み - 1993 |

イベント | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) - Singapore, Singapore 継続期間: 6 6 1993 → 6 11 1993 |

### その他

その他 | Proceedings of the Third (1993) International Offshore and Polar Engineering Conference, Part 3 (of 4) |
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City | Singapore, Singapore |

Period | 6/6/93 → 6/11/93 |

## All Science Journal Classification (ASJC) codes

- Engineering(all)