## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volumes 1-2American Society of Mechanical Engineers, 1991 - Arctic regions |

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Page 167

The wave system described by equation ( 2 ) exerts a second - order wave (

difference - frequency wave

The wave system described by equation ( 2 ) exerts a second - order wave (

**drift**)**force**on the platform that can be ... wk ) is the ( quadratic ) transfer function for thedifference - frequency wave

**drift force**due to the presence of two simultaneous ...Page 171

This was , of course , due to the difference in the method of estimating

. ... frequency surge obtained from simulations using Marthinsen's method to

estimate

to ...

This was , of course , due to the difference in the method of estimating

**drift forces**. ... frequency surge obtained from simulations using Marthinsen's method to

estimate

**drift force**and using constant wave drift damping were almost identicalto ...

Page 255

1991 OMAE – Volume 1 - A , Offshore Technology ASME – 1991 1 Abstract 2

Introduction Forces on marine structures ... Numerical examples show that the

mean

...

1991 OMAE – Volume 1 - A , Offshore Technology ASME – 1991 1 Abstract 2

Introduction Forces on marine structures ... Numerical examples show that the

mean

**drift force**and the mean yaw moment may be changed by 100 % even for a...

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### Contents

SPECIAL SESSION HYDRODYNAMICS | 1 |

HYDRODYNAMIC FORCES | 29 |

SECONDORDER EFFECTS | 113 |

Copyright | |

47 other sections not shown

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### Common terms and phrases

acting amplitude analysis angle applied approach approximately assumed average body boundary cable calculated circular cylinder coefficients compared comparison components computed considered constant corresponding cylinder damping depth described determined diffraction direction distribution domain drag drift force effect element Engineering equation estimates experimental experiments expressed field Figure floating flow fluid follows free surface frequency function given height horizontal hydrodynamic incident included increase integral irregular waves length lift force linear loads mass maximum mean measured method mode mooring motion natural nonlinear obtained Ocean Offshore oscillation period phase platform points position potential predicted present pressure problem random range regular relative represents respectively response second order second-order separation ship shown shows simulation solution spectrum structure surge Table tests theory values velocity vertical vortex wave forces