Experimental uncertainty analysis of monopile scour protection stability tests. (July 2023)

• Record Type: Journal Article
• Authors: Wu, Minghao; Stratigaki, Vasiliki; Fazeres-Ferradosa, Tiago; Rosa-Santos, Paulo; Taveira-Pinto, Francisco; Troch, Peter
• Is Part Of: Renewable energy. Volume 210(2023)
• Page Start: 174
• Page End: 187
• Publication Date: 2023-07
• Subjects: Monopile -- Scour protection -- Stability -- Experiment -- Uncertainty analysis; Renewable energy sources -- Periodicals; Power resources -- Periodicals; Énergies renouvelables -- Périodiques; Ressources énergétiques -- Périodiques; 333.794
• DOI: 10.1016/j.renene.2023.04.004
• Languages: English
• ISSNs: 0960-1481

Abstract

Abstract: Hydraulic experiments using physical scale models of monopile scour protections typically have high experimental uncertainties and data scattering. These uncertainties may severely affect the accuracy of the experimental results and need to be analysed quantitatively. This paper presents a study on the quantification of experimental uncertainties in monopile scour protection damage tests following the Guide to the expression of Uncertainty in Measurement (GUM) (ISO, 2008). The uncertainty analysis is performed using the three-dimensional damage number S 3 D and the widely applied S T A B number. Through the analysis of the S 3 D number from individual test and repeated tests, it is found that the uncertainty analysis method for an individual test can be efficiently applied to predict the experimental uncertainty. The wave peak period and the current velocity are identified as the two major sources of uncertainties for the S 3 D number. The flow turbulence and correlations between input parameters can be neglected when estimating the uncertainty. The uncertainty analysis of the S T A B number shows that the experimental uncertainty due to measurement can be up to 5% to 7% of the obtained S T A B result. This uncertainty range is wide in comparison with the narrow margin of a dynamic scour protection design in DNV's recent recommended practice (DNV-RP-0618). The uncertainty of the S T A B number is more affected by the armour stone density, wave peak period and significant wave height. Highlights: Uncertainty analysis performed for monopile scour protection experiments. Uncertainty analysis based on S3D and STAB numbers. Individual test and repeated tests yield similar S3D uncertainty level. Influences from various test parameters investigated. Wide STAB parameter uncertainty range observed.