## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, Parts 1-2American Society of Mechanical Engineers, 2000 - Arctic regions |

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Page 10

( 1 ) an . bu and cu are respectively added - mass ,

components of the system , while F \ - ( t ) are slowly varying drift forces . In fact ,

Eq . 1 is not a linearised equation of motion . The hydrodynamic coefficients

depend only ...

( 1 ) an . bu and cu are respectively added - mass ,

**damping**and restoringcomponents of the system , while F \ - ( t ) are slowly varying drift forces . In fact ,

Eq . 1 is not a linearised equation of motion . The hydrodynamic coefficients

depend only ...

Page 121

Table 1 - Sources of energy dissipation in earthquakes Type Material

Mechanical

structural Basic structural

matrix ...

Table 1 - Sources of energy dissipation in earthquakes Type Material

**damping**Mechanical

**damping**| Mechanism | Representation Structural Hysteresis instructural Basic structural

**damping**, material modeled by Rayleigh**damping**matrix ...

Page 122

3 -

hydrodynamic

analyses

entrapped water ...

3 -

**Damping**ratio vs . angular frequency Fig . 4 - Drag coefficient forhydrodynamic

**damping**in still water . Tab . II – Weight - factors Oy used foranalyses

**DAMPING**1 2 % 3 % The mass of conductor pipe grouting and of theentrapped water ...

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### Contents

OCEAN SPACE UTILIZATION AND OFFSHORE TECHNOLOGY | 1 |

Evaluation of Low Frequency Motions of a Turret Moored FPSO System and Their Influence | 9 |

OMAE2000OSU OFT3005 | 17 |

Copyright | |

86 other sections not shown

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### Common terms and phrases

amplitude analysis applied approach ASME assessment assumed bending calculated coefficient compared comparison components computed considered Copyright corresponding cylinder damage damping defined dependent depth determined developed direction displacement distribution dynamic effects element energy Engineering equation estimated example extreme factor failure fatigue Figure floating fluid forces frequency function given heave horizontal important included increase initial International joint length limit linear load mass maximum mean measured method mode mooring motion nonlinear observed obtained Offshore operations parameters peak performed period pipeline plates platform position predicted present pressure probability problem procedure range ratio reference relative reliability represent respectively response riser risk safety ship shown shows significant simulation soil spectrum standard stiffness strength stress structure surface Table tension tests values variables vertical vessel wave height wind