## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2; Volume 8, Part 2American Society of Mechanical Engineers, 1989 - Arctic regions |

### From inside the book

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Page 319

ON THE

ON THE

**DAMPING**OF AND FORCES ON A CURRENT INDUCED VIBRATING PIPELINE A. Torum Norwegian Institute of Technology / Norwegian Hydrotechnical Laboratory B. Bostrom and A. B. Sandey Norwegian Institute of Technology Trondheim , Norway 3 .Page 321

8 . ms fn , Hz f , Hz in air in water S / ms kg Ks ma kg Since all the data in Griffin's diagram were for cylinders vibrating far from any fixed boundary . it was felt useful to investigate how the structural

8 . ms fn , Hz f , Hz in air in water S / ms kg Ks ma kg Since all the data in Griffin's diagram were for cylinders vibrating far from any fixed boundary . it was felt useful to investigate how the structural

**damping**would effect the ...Page 510

X1 / 3 = significant value of lowfrequency motion From the above expressions we get be as much as one order of magnitude higher than the viscous hull

X1 / 3 = significant value of lowfrequency motion From the above expressions we get be as much as one order of magnitude higher than the viscous hull

**damping**. In carefully conducted model tests these contributions will not be subject ...### What people are saying - Write a review

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### Contents

HYDRODYNAMIC FORCES | 1 |

WaveCurrent Force on Horizontal Cylinder | 7 |

DoubleFactor Method for the Linearization of Drag Force | 39 |

Copyright | |

45 other sections not shown

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### Common terms and phrases

added mass amplitude analysis applied approach approximately assumed body boundary calculated circular compared components computed considered correlation corresponding cylinder damping defined depends depth described determined direction distribution drag coefficient drift force effect elements Engineering equation estimate experimental experiments expressed extreme factor failure Figure flow fluid free surface frequency function given horizontal hydrodynamic important in-line included increase indicate integral length lift lift force linear load maximum mean measured Mechanics method mode motion nonlinear normal obtained Offshore oscillation parameters period pipeline potential predicted present pressure probability problem random range ratio reference relative reliability represented respectively response second order separation shear ship shown shows simulation solution structure surface Table term tests theory transverse uncertainty variables varying velocity vertical vortex wave force wave height