Stevpris Mk6 드래그 앵커의 지지력에 대한 수치해석 연구

초록

Drag anchors are key components for mooring floating offshore wind turbines, but empirical formulas derived from small-scale experiments have limitations in reliably predicting the holding capacity of large anchors. In this paper, the holding capacity and pull-out behavior of the Stevpris Mk6 drag anchor were numerically analyzed using the Coupled Eulerian–Lagrangian method. The analysis results indicated that the ultimate holding capacity increased proportionally with both anchor weight and the undrained shear strength of the soil, showing good agreement with the design charts provided by Vryhof. Under a water depth of 150 m, the 245.3 kN (25 tonf) anchor exhibited stable performance at pull-out angles of 5° and 10°, exceeding the design capacity of 18,200 kN, whereas at 15°, pull-out behavior occurred, accompanied by reduced penetration and a gradual decrease in holding capacity.

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