## 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 232

... Ax is the element length on the free surface . We can now calculate the time -

dependent phase velocity C at each time step .

can be expressed at time t + at by Eq . ( 18 ) and substituting Eq . ( 14 ) into Eq ...

... Ax is the element length on the free surface . We can now calculate the time -

dependent phase velocity C at each time step .

**Assuming**the Orlanski conditioncan be expressed at time t + at by Eq . ( 18 ) and substituting Eq . ( 14 ) into Eq ...

Page 476

By comparison the result based on this

author , it indicates that Yamamoto's ... governing equation obtained and the

boundary conditions for the porous fluid pressure are as follows .

P ( x ...

By comparison the result based on this

**assumption**with that obtained by otherauthor , it indicates that Yamamoto's ... governing equation obtained and the

boundary conditions for the porous fluid pressure are as follows .

**assume**as P =P ( x ...

Page 170

Without loss of generality , it is

unit covariance matrix and that the covariance matrix of the velocity process U ( t )

is diagonal . The covariance matrix for U ( t ) , U ( t ) is defined as 1 ( t ) с ( 37 ) R ...

Without loss of generality , it is

**assumed**that U ( t ) is a zero mean process withunit covariance matrix and that the covariance matrix of the velocity process U ( t )

is diagonal . The covariance matrix for U ( t ) , U ( t ) is defined as 1 ( t ) с ( 37 ) R ...

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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