## 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 427

In Sørensen & Sterndorff ( 2000 ) stochastic models for the annual maximum

values of the omnidirectional and directional

wave heights , and individual crest heights were presented . The models include

...

In Sørensen & Sterndorff ( 2000 ) stochastic models for the annual maximum

values of the omnidirectional and directional

**significant**wave heights , individualwave heights , and individual crest heights were presented . The models include

...

Page 428

It is assumed that the maximum

into account can modelled by : H , = H ; + Z ( 3 ) where Z is a Normally distributed

stochastic variable which is assumed to be independent of Hs . Directional waves

...

It is assumed that the maximum

**significant**wave height H , taking these effectsinto account can modelled by : H , = H ; + Z ( 3 ) where Z is a Normally distributed

stochastic variable which is assumed to be independent of Hs . Directional waves

...

Page 431

Empirical and fitted distribution functions tor West direction . Top : without

correlation . Bottom : with correlation . Table 2 . Estimated statistical parameters

and characteristic

taken ...

Empirical and fitted distribution functions tor West direction . Top : without

correlation . Bottom : with correlation . Table 2 . Estimated statistical parameters

and characteristic

**significant**wave height ( in meters ) . Directional correlation istaken ...

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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 growth 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 storm strength stress structure surface Table theory typical uncertainty variables wave height wind