## 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 21

( 9 ) - there is added significance in directly evaluating the water line integral at z

= 0 ( rather than extrapolating from the centroids of

the commonest method of solving integral equations such as eq . ( 1 ) or eq .

( 9 ) - there is added significance in directly evaluating the water line integral at z

= 0 ( rather than extrapolating from the centroids of

**constant**panels ) . to By farthe commonest method of solving integral equations such as eq . ( 1 ) or eq .

Page 21

( 1 ) or eq . ( 2 ) for the radiation and diffraction problems is the

method . this , the velocity is generally assumed

the integral equation is enforced at a representative point on each panel ...

( 1 ) or eq . ( 2 ) for the radiation and diffraction problems is the

**constant**panelmethod . this , the velocity is generally assumed

**constant**over a flat panel , andthe integral equation is enforced at a representative point on each panel ...

Page 169

...

where Sc ( w ) denotes spectral density of the seaway . Substituting

values for time dependent wave drift damping coefficient bw ( t ) in equation ...

...

**constant**āw in an irregular seaway using bw = 2 % ° sc ( w ) Bw ( w ) dw ( 22 )where Sc ( w ) denotes spectral density of the seaway . Substituting

**constant**āwvalues for time dependent wave drift damping coefficient bw ( t ) in equation ...

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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