## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 1American Society of Mechanical Engineers, 2006 - Arctic regions |

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Page 135

Given that the velocity vectors are computed at half - station points , it remains to

define an expression for U , whish is needed for the

recommended to average Un over a time step as ü , = ž ( Ur + 12 + , - 12 ) ( 22 ) ...

Given that the velocity vectors are computed at half - station points , it remains to

define an expression for U , whish is needed for the

**damping**term . In [ 8 ] it isrecommended to average Un over a time step as ü , = ž ( Ur + 12 + , - 12 ) ( 22 ) ...

Page 206

As the perforated area increases , heave

value reaches to about 5 . 4 % , and then decreases . Variation of added mass is

not so distinct , however , it presents a trend of decline as the ratio increases . Fig

.

As the perforated area increases , heave

**damping**increases until the Sh / S ,value reaches to about 5 . 4 % , and then decreases . Variation of added mass is

not so distinct , however , it presents a trend of decline as the ratio increases . Fig

.

Page 569

Usually , if non - conservative forces are present in the system , the Lagrange ' s

equation of motion can take them into account as forcing functions on the right -

hand side of the equation , and if the non - consevative force is a linear

...

Usually , if non - conservative forces are present in the system , the Lagrange ' s

equation of motion can take them into account as forcing functions on the right -

hand side of the equation , and if the non - consevative force is a linear

**damping**...

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### Contents

OFFSHORE TECHNOLOGY | 1 |

OMAE200692014 | 7 |

OMAE200692049 | 17 |

Copyright | |

50 other sections not shown

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### Common terms and phrases

added amplitude analysis applied approach ASME bending body bottom boundary calculated capacity coefficients collision compared comparison computed configuration considered Copyright coupled curve damage damping deck defined developed direction displacement distribution domain dynamic effects element energy Engineering equation estimate experimental experiments fatigue field Figure floating flow force frequency function given heave height hull hydrodynamic impact increase International joints length linear load locations mass maximum mean measured Mechanics method mode mooring motion natural nonlinear numerical obtained Ocean offshore operation parameters performed period pile pipe plate platform position predicted presented pressure problem ratio reduced reference relative represents respectively response riser sensor ship shown shows simulation soil solution static stiffness stress structure surface Table tank tension transverse unit values vertical vessel water depth wave weld wind