Monopiles are the most commonly used foundation type for offshore wind turbines,making it cru-cial to study their bearing mechanisms and failure modes.The p-y curve method recommended by the API speci-fication tends to underestimate ultimate soil resistance,leading to conservative monopile designs.The PISA method,developed for large-diameter,horizontally loaded monopiles,employs four-stiffness springs to simulate soil-pile interaction,providing a more accurate representation of the stress modes in large-diameter monopiles.This paper utilizes the Plaxis Monopile Designer package to analyze and optimize the design of large-diameter monopiles for an offshore wind turbine project.The results indicate that,while meeting criteria such as structur-al strength,overall machine frequency,and fatigue damage,the PISA-based design method can effectively re-duce the amount of steel required for the foundation structure.
维普
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