Modeling and Predicting the Rate of Scour Depth below Pipelines in Waves Using Gaussian Process Regression (GPR) and Support Vector Machine (SVM) Methods

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Roushangar Kiyoumars; Shafie Naeibi Shima; Lotfollahi Yaghin Mohammad Ali; Ramazanilar Mehrdad

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Journal: Year:2023 | Volume: | Issue: Page(s): 1-9

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Title

Modeling and Predicting the Rate of Scour Depth below Pipelines in Waves Using Gaussian Process Regression (GPR) and Support Vector Machine (SVM) Methods

Author(s)

Roushangar Kiyoumars | Shafie Naeibi Shima | Lotfollahi Yaghin Mohammad Ali | Ramazanilar Mehrdad | Issue Writer Certificate

Keywords

Scour depthQ4

PipelinesQ4

WavesQ4

Kernel-Based MethodQ4

Gaussian process regression (GPR)Q4

support vector machine (SVM)Q4

Abstract

Pipeline network is one of the major agents of the economic growth and development of a country, which is used to transport fluid fuels, wastewaters, and any other fluids. When these Pipelines meet seas and oceans, pipes are laid on the solid bed and it causes changes in the flow pattern around the pipes. In result of these changes, the shear stress of the bed under Pipelines and turbulence of current will be increased, and scour will occur under Pipelines and the scour hole will form and develop. These holes cause damage and failure to the pipe due to the pipe weight and oscillating loads. Therefore, it is very important to study the Scour depth and effective variables to reduce scour and prevent damage. Researchers have conducted experimental and numerical studies on scour phenomenon, considering various types of flows and conditions, and have provided different relations over the years.In this research, the effect of various factors on this phenomenon in Waves is investigated using Gaussian process regression (GPR) and support vector machine (SVM). To this end, several laboratory data were used and after defining several non-dimensional parameters the performance of these methods was evaluated. The result of this research demonstrated that these methods are better than experimental relations and have promising outcomes. This study has shown that an SVM model with KC, Re and variables in wave-induced current has the best results. It is worth mentioning that the KC variable has the most significant effect on the scour below Pipelines.

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