## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 2American Society of Mechanical Engineers, 2001 - Arctic regions |

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Page 149

The program decomposes the irregular

coefficients and phases defined by the halfwave Keulegan - Carpenter number

and the ...

The program decomposes the irregular

**wave**time series into halfwave regular**waves**for which the hydrodynamic**force**is calculated from a set of Fouriercoefficients and phases defined by the halfwave Keulegan - Carpenter number

and the ...

Page 150

For example , a completely regular

angle could produce oppositely directed

length , and

expected ...

For example , a completely regular

**wave**approaching the pipe at an obliqueangle could produce oppositely directed

**forces**at different points on the pipelength , and

**wave**spreading ( or short - crestedness ) in a random sea can beexpected ...

Page 366

... it is not easy to evaluate probabilistic properties of extreme wave loads in

notional extreme sea - states and thus a first - order second - moment method (

FOSM ) is applied to approximated them as follows : Let the maximum

L. ( t ) ...

... it is not easy to evaluate probabilistic properties of extreme wave loads in

notional extreme sea - states and thus a first - order second - moment method (

FOSM ) is applied to approximated them as follows : Let the maximum

**wave force**L. ( t ) ...

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acceptable analysis applied approach assessment associated assumed calculated coefficient combined components considered corresponding corrosion cost crack criteria damage dependent depth determined developed directional distribution dynamic effect element Engineering environmental equation estimate evaluated example expressed extreme factor failure fatigue Figure force frequency function fuzzy given important increase initial inspection limit load loss maintenance marine maximum mean measures Mechanics method motion normal observed obtained offshore operations parameters peak performed period pipe pipeline platform possible prediction present probability procedure production random range relative reliability represented response return period riser risk safety ship shown shows significant simulation spectral spectrum statistical steel storm strength stress structure surface Table theory typical uncertainty variables wave height wind