| Title |
Variation in the Pullout Capacity according to the Misorientation of Suction Anchor Using Geometric Method and Numerical Analysis |
| Authors |
이원효(Lee, Won Hyo) ; 정나영(Jung, Na Young) ; 안제영(An, Je Young) ; 김대환(Kim, Dae Hwan) ; 김태형(Kim, Tae Hyung) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.2.0225 |
| Keywords |
석션앵커; 회전오차; 인발지지력; 부유식 해상풍력 Suction anchor; Misorientation; Pullout capacity; Floating offshore wind turbine |
| Abstract |
In this study, geometric calculation and numerical analysis were performed to determine the effect of misorientation on the pullout capacity of a suction anchor of floating offshore wind turbine. In geometric calculation method, the effect of the misorientation (β) of the suction anchor on the pullout capacity was found to be small, with a decrease of less than 3 % in the pullout capacity when the misorientation was within 20°, and up to 30 % for a misorientation (β) of 90°. The calculation of the pullout capacity through numerical analysis was compared and reviewed based on the plastic state of the ground. As a result, the displacement 0.1D (D: anchor diameter) criterion, where general shear failure occurs around the suction anchor, was evaluated to be more suitable for determining the pullout capacity of the anchor than the 15 % shear strain of the ground. In addition, the change in pullout capacity due to the misorientation of the suction anchor using the geometric method was very similar to the numerical analysis results. Therefore, in the case of silty sand soil condition applied in this study, even if numerical analysis is not performed on the occurrence of misorientation during actual anchoring, the reduction of the pullout capacity of the suction anchor can be easily derived using geometric method. |