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 64
... Present analysis 0.08 4.75 0.91 1.68 Present analysis 0.08 4.26 0.92 1.55 Present analysis 0.08 3.71 0.93 1.43 Present analysis 0.16 3.60 * 0.94 1.6 310 m • Reduction in reliability index from 8 = 4.26 by doubling COV on response ...
... Present analysis 0.08 4.75 0.91 1.68 Present analysis 0.08 4.26 0.92 1.55 Present analysis 0.08 3.71 0.93 1.43 Present analysis 0.16 3.60 * 0.94 1.6 310 m • Reduction in reliability index from 8 = 4.26 by doubling COV on response ...
Page 100
... Present Method ; Experiment 0.4- : Gaussian Maximum lags are 512 and 128 for a cross - spectrum and a cross - bispectrum respectively , for 12288 total data which are 10 minutes measured data for a tanker , and for 6144 total data which ...
... Present Method ; Experiment 0.4- : Gaussian Maximum lags are 512 and 128 for a cross - spectrum and a cross - bispectrum respectively , for 12288 total data which are 10 minutes measured data for a tanker , and for 6144 total data which ...
Page 101
... Present Method : Experiment : Rayleigh 0.65 0.4 0.2 : Present Method : Experiment : Gaussian 0.0 200 300 - 2.0 0.0 2.0 4.0 - 4.0 n x / 0x Fig.12 1 / n th highest expected amplitude of semi - submersible . peak frequency of wave = 7.0 ...
... Present Method : Experiment : Rayleigh 0.65 0.4 0.2 : Present Method : Experiment : Gaussian 0.0 200 300 - 2.0 0.0 2.0 4.0 - 4.0 n x / 0x Fig.12 1 / n th highest expected amplitude of semi - submersible . peak frequency of wave = 7.0 ...
Contents
Investigation of the Ergodicity Assumption for Sea States in the Reliability Assessment of Offshore | 1 |
OFFSHORE TECHNOLOGY PART A | 33 |
Extreme Forces on Large AxiSymmetric Offshore Structures in Directional Seas | 49 |
Copyright | |
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amplitude applied assessment assumed axial basic variables behaviour calculated coefficient component computed considered corrosion cost crack depth crack growth rate CTOD curve defect deterministic drag force effects Engineering environmental equation estimated evaluated extreme failure mode failure probability fatigue crack growth fatigue damage fatigue failure fatigue strength Figure fracture mechanics fracture toughness frequency Gaussian geometry hindcast initial inspection instability load integration limit state function linear Lognormal LRFD material maxima maximum mean value method nonlinear normal normal distribution North Sea obtained offshore structures parameters platform predicted pressure probabilistic probability density function probability distribution quadratic random variable ratio reliability analysis reliability index residual stresses response risk S-N curve safety sea-state significant wave height simulation spectral standard deviation statistical stochastic storm stress intensity factor stress range Table tension tether tubular joints vector Weibull distribution weld weldments