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Keywords: Uncertainty
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Proceedings Papers

Proc. ASME. OMAE2023, Volume 7: CFD & FSI, V007T08A036, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-102184
... and pressure measured at five monitoring points on the deck are compared with experimental data, while the ship motion is fixed in head waves. The numerical uncertainty of time steps and grid sizes is discussed in details. A set of simulation results with appropriate grid and time step are compared...
Proceedings Papers

Proc. ASME. OMAE2023, Volume 9: Offshore Geotechnics; Petroleum Technology, V009T11A002, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-104485
... Abstract In this paper, an integrated algorithm is proposed to optimize the hybrid steam-solvent injection-production schemes for post-CHOPS reservoirs under uncertainty. First of all, the newly developed pressure-gradient-based (PGB) sand failure criterion is employed to generate dendritic...
Proceedings Papers

Proc. ASME. OMAE2023, Volume 6: Polar and Arctic Sciences and Technology, V006T07A005, June 11–16, 2023
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2023-101757
... provide valuable information on the state of the Arctic ice cover and have been used as a source of ‘ground truth’ for other satellite products. However, their manual nature raises concerns about the associated uncertainty. To address these concerns, the present study evaluates the uncertainty of total...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 6: Polar and Arctic Sciences and Technology, V006T07A002, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-79051
... when several ships were stuck and delayed in the Arctic waters, it becomes ever more important to have accurate and timely ice information as well as to account for the underlying uncertainties in the sea ice products. To this end, the present study evaluates the variability in estimated total sea ice...
Proceedings Papers

Proc. ASME. OMAE2022, Volume 5B: Ocean Engineering; Honoring Symposium for Professor Günther F. Clauss on Hydrodynamics and Ocean Engineering, V05BT06A010, June 5–10, 2022
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2022-81133
... wavelengths and mounted directly in the probe. The towing carriage speed of initial point and predetermined moved points were repeatedly measured by the 2D probe. The test duration was changed to obtained appropriate sample sizes, which was applied into the later test. Uncertainty analysis of LDV calibration...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 2B: Structures, Safety, and Reliability, V02BT02A002, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19119
... might amass to considerable costs. On the other hand, pushing the limits of the load capacity of the riser-stack and wellhead may compromise the integrity of the well itself, and such a failure is not an option. Advanced simulation techniques may reduce uncertainty about how different weather scenarios...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 8: CFD and FSI, V008T08A042, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18755
... and 0.25LBP forward and aft of midships are also calculated and compared with the measured values. Through comparison with experimental data, the relative uncertainty of all four methodologies in predicting both motions and structural loads are assessed and discussed. Overall, all linearized potential flow...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 8: CFD and FSI, V008T08A044, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-19093
... Abstract CFD uncertainty analysis is a process to quantify the accuracy of numerical simulation results, and it is also a research hotspot in the past decades. ITTC(2017) requires uncertainty analysis of ship CFD simulation results, that is, verification and validation. In this paper...
Proceedings Papers

Proc. ASME. OMAE2020, Volume 11: Petroleum Technology, V011T11A019, August 3–7, 2020
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2020-18052
... Abstract The requirement of uncertainty analysis has shifted the transformation of sensitivity analysis from the deterministic area to the stochastic area.Geomechanical wellbore integrity problems during drilling operation can occur due to wellbore shear failure or tensile failure. To guarantee...
Proceedings Papers

Proc. ASME. OMAE2012, Volume 2: Structures, Safety and Reliability, 145-153, July 1–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2012-83293
... Gothenburg, Sweden [email protected] ABSTRACT The design and analysis of structural strength against fatigue failure always includes large uncertainties. It is crucial to understand and identify the most important uncertainties that affect the performance, functionality and service life of an engineering...
Proceedings Papers

Proc. ASME. OMAE2010, 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 2, 31-39, June 6–11, 2010
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2010-20045
... bending stresses are highest. Unfortunately, it is also at this region that uncertainty is the maximum. The increased uncertainty casts doubt on the applicability of generic safety factors recommended by design codes, and the most consistent way of ensuring the structural safety of the SCR is to employ...
Proceedings Papers

Proc. ASME. OMAE2007, Volume 2: Structures, Safety and Reliability; Petroleum Technology Symposium, 679-685, June 10–15, 2007
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2007-29770
.... Marine environment ocean wind wave current sea level ice climate change remote sensing wave spectra numerical modeling probabilistic modeling freak or rogue waves met-ocean climate extreme values design condition operational condition uncertainty Proceedings of the 26th International...
Proceedings Papers

Proc. ASME. OMAE2002, 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, 25-29, June 23–28, 2002
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2002-28018
... decision-making petroleum field development projects uncertainty preferences The development of petroleum fields involves both technical and commercial uncertainties. The technical uncertainties associate with the geological and technical complexity of producing hydrocarbon resources...
Proceedings Papers

Proc. ASME. OMAE2002, 21st International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, 31-39, June 23–28, 2002
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2002-28019
... for better understanding their principles, but also for their appropriate application. uncertainty decision analysis probabilistic estimates interval estimates Proceedings of OMAE 2002: 21st Offshore Mechanics And Arctic Engineering Conference 23th - 28th June 2002, Oslo, Norway BI CE Cha 57 U i...
Proceedings Papers

Proc. ASME. OMAE2003, Volume 2: Safety and Reliability; Pipeline Technology, 41-46, June 8–13, 2003
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2003-37046
... crossing theory. In this paper, uncertainties of offshore jacket platform dynamic reliability subjected to wave hydrodynamic and seismic action are studied respectively. The probabilistic distributions and its statistical characteristics of wave hydrodynamic and seismic action are given on the base...
Proceedings Papers

Proc. ASME. OMAE2003, Volume 2: Safety and Reliability; Pipeline Technology, 433-442, June 8–13, 2003
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2003-37450
... 09 01 2009 The classical probability theory cannot effectively quantify the parameter uncertainty in probability of detection. Furthermore, the conventional data analytic method and expert judgment method fail to handle the problem of model uncertainty updating with the information...
Proceedings Papers

Proc. ASME. OMAE2003, Volume 2: Safety and Reliability; Pipeline Technology, 227-237, June 8–13, 2003
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2003-37259
... in the response of the site of interest, are presented. In this study the probabilistic model of the soil, take into account the uncertainty in soil dynamic properties, due to the fact that the soil dynamic properties play an important role on the interpretation of free-field motion. In this work an explicit form...
Proceedings Papers

Proc. ASME. OMAE2004, 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, 149-154, June 20–25, 2004
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2004-51160
... 05 01 2009 Extreme Value Analysis Design Wave Confidence Interval Bootstrap Monte-Carlo Profile Likelihood Uncertainty Data Analysis Estimation of high return period values of wind and wave conditions is usually done using a limited sample of data from measurement...
Proceedings Papers

Proc. ASME. OMAE2004, 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, 155-161, June 20–25, 2004
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2004-51161
.... In this paper, a modified probability distribution function is derived so that modeling uncertainties can be explicitly included in extreme value analysis. Maximum likelihood estimation is then used to incorporate hindcast uncertainty into return value estimates and confidence intervals. The method presented...
Proceedings Papers

Proc. ASME. OMAE2004, 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 2, 33-43, June 20–25, 2004
Publisher: American Society of Mechanical Engineers
Paper No: OMAE2004-51025
... Aleatoric corrosion epistemic integrity pipeline reliability risk assessment and management uncertainty A comprehensive reliability based formulation is proposed for the assessment of the integrity of corroded pipelines. In this formulation, the inspection technique, the pipeline...