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Keywords: random variable
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Proceedings Papers

Paper presented at the The 29th International Ocean and Polar Engineering Conference, June 16–21, 2019
Paper Number: ISOPE-I-19-149
... as a random variable in the realizability design of a monopiled OWT. Modeling a monopiled OWT as a SDOF system subjected to irregular wind and wave loadings, this study develops an efficient method to compute the probabilistic moments of the tower top response of the OWT when its damping is treated...
Proceedings Papers

Paper presented at the The 28th International Ocean and Polar Engineering Conference, June 10–15, 2018
Paper Number: ISOPE-I-18-489
... factors used in modern design codes such as DNV-OS-F101. An alternative to this load and resistance factor design (LRFD) approach is performing a probabilistic assessment, for example by means of Monte Carlo simulation. In a Monte Carlo simulation the relevant input parameters behave as random variables...
Proceedings Papers

Paper presented at the The 27th International Ocean and Polar Engineering Conference, June 25–30, 2017
Paper Number: ISOPE-I-17-371
... parameters may be handled by a Monte Carlo simulation (Metropolis and Ulam, 1949), but large number of sample and corresponding simulation require practically infeasible computational burden. The computation cost increase dramatically especially when the number of random variables exceed 3 or 4 eventually...
Proceedings Papers

Paper presented at the The 26th International Ocean and Polar Engineering Conference, June 26–July 2, 2016
Paper Number: ISOPE-I-16-109
... reliability artificial intelligence equation assessment materials and corrosion defect pipeline well integrity safety factor failure probability safety class strength riser corrosion engineering subsurface corrosion international journal random variable midstream oil & gas flowline...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-680
..., the random variables being selected are the yield stresses of the n elements of the structure. A genetic algorithm is implemented for the selective searching of n-dimensional space of random variables in order to obtain dominant failure modes in decreasing order of their probability of occurrence...
Proceedings Papers

Paper presented at the The Twenty-fifth International Ocean and Polar Engineering Conference, June 21–26, 2015
Paper Number: ISOPE-I-15-712
... random variables are taken into account. The conventional way for a long-term fatigue calculation recommended by design codes is the practice of lumping of sea states into a small number of manageable bins. However, there are no explicit guidelines for blocking strategy and the precision of this method...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-498
.... Finally, a case study of jacket platform located in the South China Sea is proposed. risk level failure consequence consequence strength equation random variable pushover result pushover analysis subsea system public safety law enforcement jacket platform probability fatigue failure...
Proceedings Papers

Paper presented at the The Twenty-fourth International Ocean and Polar Engineering Conference, June 15–20, 2014
Paper Number: ISOPE-I-14-539
... reliability system reliability offshore structure target value random variable artificial intelligence transfer function information optimization problem inspection probability machine learning inspection information sea state assessment inspection extend detection crack detection limit...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-328
... return pressure simulation correlation function tank physical sensor estimation probability maxima sensor lng confidence interval weibull distribution gtt procedure pressure field information random variable liquified natural gas array 2 gas monetization assessment Stochastic...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-137
... commonly used distribution models of linear and non-linear random variables. Additionally, the application of three-parameter Rayleigh distribution model in estimating the probability distribution of linear and non-linear responses of turret-moored FPSOs is studied. The performance of these distribution...
Proceedings Papers

Paper presented at the The Twenty-third International Offshore and Polar Engineering Conference, June 30–July 5, 2013
Paper Number: ISOPE-I-13-570
.... The reliability assessment includes parameters related to corrosion, pipeline dimensions and liquid flow, all treated as random variables. The influence of the weld heat affected zone is considered critical in the analysis. The effect of random variable variability is assessed by means of a sensitivity study...
Proceedings Papers

Paper presented at the The Twenty-first International Offshore and Polar Engineering Conference, June 19–24, 2011
Paper Number: ISOPE-I-11-213
... of uncertainties (Pellissetti & Schuller, 2006). marine transportation reliability performance function stress intensity factor fatigue fracture reliability random variable configuration specimen hydraulic fracturing fracture toughness formulation reliability calculation contour integral...
Proceedings Papers

Paper presented at the The Twentieth International Offshore and Polar Engineering Conference, June 20–25, 2010
Paper Number: ISOPE-I-10-019
... reliability estimation. The influence of various random variables on overall probability of failure has been studied through sensitivity analysis. Procedures for constructing accurate response surface approximations used in marine riser fatigue reliability analysis are discussed. It is shown that using...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-241
... associated with a target failure probability or, equivalently, a prescribed service life for the turbine. In the probabilistic approach, variables describing the wind and wave environment as well as the turbine response are modeled as random variables whose probabilistic distributions need to be established...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-269
... are expressed as interval variables instead of random variables. In numerical example, fatigue lifetime of the tenders of tension leg platform is assessed using hybrid models of probabilistic and non-probabilistic based on S-N approach and fracture mechanics approach. The new model overcomes the shortcoming...
Proceedings Papers

Paper presented at the The Sixteenth International Offshore and Polar Engineering Conference, May 28–June 2, 2006
Paper Number: ISOPE-I-06-077
... displacement explosion duration standard deviation explosion strength limit state reliability index explosion resistant design blast wall overpressure deformation random variable performance function frequency stainless steel conditional probability artificial intelligence reliability Paper...
Proceedings Papers

Paper presented at the The Twelfth International Offshore and Polar Engineering Conference, May 26–31, 2002
Paper Number: ISOPE-I-02-430
... of paper, they (Harlow and Wei, 1994, 1999) have developed a mechanistically based probabilistic approach for prediction of corrosion and corrosion fatigue life in aluminum alloys. total life pipeline corrosion random variable flowline corrosion mechanistically aiaa journal materials...
Proceedings Papers

Paper presented at the The Eleventh International Offshore and Polar Engineering Conference, June 17–22, 2001
Paper Number: ISOPE-I-01-018
.... For a component reliability analysis, failure criteria are usually set on the limiting factors of strength or behaviour of the jack-up and are of the form: elevation variation random variable jakup reservoir simulation response surface displacement upstream oil & gas probability extreme...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-418
... done by Christiani et al. (1996) risk analysis coefficient approximation offshore breakwater procedure geometry lamberti breakwater reliability expression random variable vertical offshore breakwater caisson breakwater failure function probability failure probability vertical...
Proceedings Papers

Paper presented at the The Seventh International Offshore and Polar Engineering Conference, May 25–30, 1997
Paper Number: ISOPE-I-97-175
... of the structure, and the fatigue strength and damage accumulation,(Almar-Ness, 1985). reliability index operational life rigid marine riser sea state random variable failure probability critical cumulative damage upstream oil & gas marine riser coefficient procedure offshore structure...

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