## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts 1-2American Society of Mechanical Engineers, 2004 - Arctic regions |

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Page 942

( 2 ) The

small for all the heading angles . ( 3 ) The overall increase to the total bending

moment ( RMS ) from the

all ...

( 2 ) The

**nonlinear**contributions to the low frequency , wave induced bending issmall for all the heading angles . ( 3 ) The overall increase to the total bending

moment ( RMS ) from the

**nonlinear**, sum - frequency excitation is under 12 % forall ...

Page 1099

) + Bu + Ht wave ( 25 ) y = Cz where f ( z ) ... ( 27a ) for closed loop : u = Gz + h ( z

) ( 276 ) The additional term h ( z ) in the control law is to cancel the

**Nonlinear**model The**nonlinear**equation of motion can be written as ż = Az + f ( z) + Bu + Ht wave ( 25 ) y = Cz where f ( z ) ... ( 27a ) for closed loop : u = Gz + h ( z

) ( 276 ) The additional term h ( z ) in the control law is to cancel the

**nonlinearity**.Page 1100

In addition ,

additional term to cancel the

forces are required based on the

forces .

In addition ,

**nonlinear**control law gives better performance since there is anadditional term to cancel the

**nonlinearity**. ... It can be seen that higher controlforces are required based on the

**nonlinear**model to compensate the mooringforces .

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### Contents

PART | 595 |

000000000000000000000000000000000000000000 | 605 |

OFFSHORE TECHNOLOGY | 608 |

Copyright | |

29 other sections not shown

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### Common terms and phrases

added amplitude analysis angle applied approach ASME assumed barge bending boundary buoy calculated capacity coefficient combined components computed connection considered Copyright corresponding damage damping deck depth determined developed diameter direction displacement dynamic effect element Engineering equation estimated event factor fatigue field Figure force FPSO frequency function given height horizontal hull iceberg impact increase installation jacket joint length limit linear load marine mass maximum mean measured method model tests mooring mooring lines mooring system motion natural numerical obtained Offshore operation parameters performed period pile pitch platform position possible potential predicted presented pressure problem range relative response riser shear ship shown shows simulations skirt solution spar speed strength stress structure surface Table tank tension trench values velocity vertical vessel wall wave wind