## 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 40

Borgman obtained a least - square error first approximation to the force power

spectral density function , Gif ( f ) , by linearizing the drag term yielding : F ( f ) X (

1 ) HA ( 1 ) F. ( 1 ) Gfr ( f ) 8 Kd2 0,2 Guu ( f ) + K ; 2 Gaa ( f ) ( 2 ) Figure 1 :

Borgman obtained a least - square error first approximation to the force power

spectral density function , Gif ( f ) , by linearizing the drag term yielding : F ( f ) X (

1 ) HA ( 1 ) F. ( 1 ) Gfr ( f ) 8 Kd2 0,2 Guu ( f ) + K ; 2 Gaa ( f ) ( 2 ) Figure 1 :

**Block**...Page 197

Log decrement calculated for each cycle , and this was averaged over

cycles to smooth the data . The length of the

rate of decay to obtain the best combination of precision for the decrement and ...

Log decrement calculated for each cycle , and this was averaged over

**blocks**ofcycles to smooth the data . The length of the

**block**was varied according to therate of decay to obtain the best combination of precision for the decrement and ...

Page 221

... beam , and

function standardized random number random variable of vertical bending

strength ship

base ...

... beam , and

**block**coefficient of those ships . probability risk reliability spectralfunction standardized random number random variable of vertical bending

strength ship

**block**coefficient at design draught coordinate of neutral axis frombase ...

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### Contents

CONTENTS | 131 |

High Frequency Hydrodynamic Damping of a TLP | 147 |

A Comparison of Results | 153 |

Copyright | |

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### Common terms and phrases

acceleration added amplitude analysis angle applied approach approximately assumed body boundary cable calculated coefficients compared components computed considered constant coordinate corresponding cylinder damping depth determined developed diffraction direction displacement distribution domain drag drift dynamic effect element Engineering equation estimated experimental experiments expressed field Figure floating flow fluid force free surface frequency function given height hydrodynamic included increase integral length lift force linear load mass maximum mean measured Mechanics method mode mooring motion natural nonlinear obtained Offshore operation oscillation period phase pile platform position potential predicted present pressure problem production range ratio relative represents respectively response second-order separation ship shown shows simulation solution stiffness structure surface surge Table Technology tension tests theory values velocity vertical vessel wave