Soheil Salahshour Langeroodi conducted research on numerical modeling and analysis of offshore monopile foundation removal processes. On March 25th, he defended his doctoral thesis.
On Tuesday March 25th, Soheil Salahshour Langeroodi defended his doctorate at the University of Stavanger (UiS). The title of the thesis is “Numerical Modeling and Analysis of Offshore Monopile Foundation Removal Process for Offshore Wind Turbines”. The supervisors were Professor Muk Chen Ong (UiS), Professor Zhiyu Jiang (UiA) and Professor II Bjørn Skaare (UiS, Equinor).
As offshore wind energy continues to expand, the efficient decommissioning of monopile foundations is essential for reducing costs and minimizing environmental impact. This study presents a numerical analysis of vibratory monopile extraction using a crane barge, focusing on two key phases. Phase 1 investigates soil resistance reduction under vibratory hammer-induced vibrations, modeled in ABAQUS using the Coupled Eulerian-Lagrangian (CEL) approach. Both cohesive and non-cohesive soils are analyzed to understand their behavior during extraction. Phase 2 evaluates the dynamic response and operability of the crane barge during monopile removal, employing SIMO simulations coupled with Phase 1 results.
By assessing the feasibility of vibro-hammers for offshore wind decommissioning, this research provides valuable insights into optimizing removal strategies while balancing cost, efficiency, and operational safety.
During the trial lecture, Soheil provided a comprehensive overview of AI and Digital Twin technologies in marine operations, showcasing their current applications, cutting-edge advancements, and future potential to improve efficiency, safety, and sustainability in the industry.
"We at IMBM are very happy to have Soheil defend his thesis, and the topic is very important and relevant for us and the industry in Norway," says Mona Minde, head of department.
Congratulations, Dr. Langeroodi!