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

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Page 478

ORIGIN OF

ORIGIN OF

**DRIFT FORCES**AT RESONANCE From first principles , since the potential**drift force**is of second order , there must be three components as follows : i ) Dww : on ii ) Dez : the**drift force**a stationary platform in waves . the ...Page 479

F = < z F ( 0 ) > + < F , Oy > ( 25 ) since by Blasius theorem , there is no force in a steady irrotational flow ( quasi - steady by the long wave assumption ) . OF A HEAVING VERTICAL COLUMN NEAR

F = < z F ( 0 ) > + < F , Oy > ( 25 ) since by Blasius theorem , there is no force in a steady irrotational flow ( quasi - steady by the long wave assumption ) . OF A HEAVING VERTICAL COLUMN NEAR

**DRIFT FORCES**RESONANCE some for iii ...Page 544

PROBABILITY DISTRIBUTION OF

PROBABILITY DISTRIBUTION OF

**DRIFT FORCES**Gaussian scale Cumulative probability FIG . ... solved lead to the following conclusions : a ) Low frequency second order viscous**drift force**is characterised by a fairly broad band spectrum over ...### What people are saying - Write a review

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### Contents

HYDRODYNAMIC FORCES | 1 |

WaveCurrent Force on Horizontal Cylinder | 7 |

On the Significance of Negative Added Mass | 53 |

Copyright | |

49 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 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 theory transverse uncertainty variables varying velocity vertical vortex wave force wave height