## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1990 - Arctic regions |

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Page 345

The resulting stiffness

tension . Further , Morison's equation is used for estimating the hydrodynamic

load on the riser . Due to the nonlinearity of the drag term appearing in this ...

The resulting stiffness

**matrix**is time dependent due to fluctuations in the riser toptension . Further , Morison's equation is used for estimating the hydrodynamic

load on the riser . Due to the nonlinearity of the drag term appearing in this ...

Page 346

In equation ( 1 ) , ( M ) is the mass

and ( K ) is the time dependent stiffness

displacement from the vertical position and the rotated chord , respectively .

Finally ...

In equation ( 1 ) , ( M ) is the mass

**matrix**, ( C ) is the structural damping**matrix**,and ( K ) is the time dependent stiffness

**matrix**. Also , ( x ) and ( x ) * denote thedisplacement from the vertical position and the rotated chord , respectively .

Finally ...

Page 401

ABSTRACT NOMENCLATURE А [ B ls ب [ B 2 s ] ] [ B 1r [ B2 ] N projected area

vessel potential damping coeff .

riser potential damping coeff .

template ...

ABSTRACT NOMENCLATURE А [ B ls ب [ B 2 s ] ] [ B 1r [ B2 ] N projected area

vessel potential damping coeff .

**matrix**- vessel viscous damping coeff .**matrix**·riser potential damping coeff .

**matrix**- riser viscous damping coeff .**matrix**template ...

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### Contents

Simulation of Hurricane Seas in a Multidirectional Wave Basin | 17 |

HYDRODYNAMIC FORCES | 47 |

The Force Coefficients on Inclined Cylinder in Random Wave and Current | 57 |

Copyright | |

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### Common terms and phrases

acting added mass amplitude analysis applied array assumed body boundary calculated circular coefficient compared comparison component considered constant corresponding crest cylinder damping defined dependent depth determined direction distribution domain drag drift dynamic effect element elevation Engineering equation estimated experimental experiments expressed Figure flow fluid forward speed frequency function given heave horizontal hydrodynamic increase integral irregular length lift force linear load maximum mean measured method mooring motion nonlinear obtained Offshore oscillation parameters period phase pile plate potential predicted present pressure problem radiation range ratio reference regular waves relative respectively response riser second-order ship shown shown in Fig simulation solution spectra spectrum structure surface surge Table theory velocity vertical vessel wave force wave height wind