## Proceedings of the ... International Conference on Offshore Mechanics and Arctic Engineering, Volume 9, Part 2American Society of Mechanical Engineers, 1990 - Arctic regions |

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Page 38

3 ( b ) - ( e ) Comparison of normalised

3 ( b ) - ( e ) Comparison of normalised

**equivalent**stress range obtained by different methods for various sea - states ADAPTING PROPOSED USA LRFD FIXED OFFSHORE PLATFORM DESIGN PRACTICE TO. a = 0.869 E : 0.495 A a : 0.610 E : 0.790 B ...Page 107

As an improvement to

As an improvement to

**equivalent**stochastic linearization of the drag force , an**equivalent**stochastic " quadratization " method is proposed , in which the drag force nonlinearity is replaced by an "**equivalent**" quadratic nonlinearity .Page 112

It can be seen that the spectra obtained by simulation and

It can be seen that the spectra obtained by simulation and

**equivalent**stochastic quadratization are in good agreement at the vicinity of both peaks . The**equivalent**stochastic quadratization method , however , is computationally much ...### What people are saying - Write a review

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### Contents

Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |

OFFSHORE TECHNOLOGY PART | 33 |

Extreme Forces on Large AxiSymmetric Offshore Structures in Directional Seas | 49 |

Copyright | |

15 other sections not shown

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### Common terms and phrases

analysis applied approach approximately assessment assumed average basic calculated coefficient component computed considered constant corresponding cost crack growth curve cycles damage defect density depends depth derived described determined developed deviation distribution drag effects Engineering equation equivalent estimated evaluated example expected extreme factor failure failure probability fatigue Figure force fracture frequency function geometry given important included increase indicated initial inspection integration joints limit linear load Lognormal material maximum mean measured mechanics method normal obtained offshore structures operation parameters performed period platform predicted present pressure probabilistic probability procedure random variable range ratio reference relative reliability represent requirements respectively response risk safety sensitivity shown shows significant simulation standard statistical storm strength stress structure surface Table tension tether tubular uncertainty variables variation wave wave height weld