| Title |
Change in Pullout Capacity of Suction Anchor due to V-shaped Trench |
| Authors |
정나영(Jung, Na Young );안제영(An, Je Young);이원효(Lee, Won Hyo);김대환(Kim, Dae Hwan);김태형(Kim, Tae Hyung) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.1.0073 |
| Keywords |
석션앵커; 트렌치 현상; 인발지지력; 계류선; 모래지반; 부유식 해상풍력 |
| Abstract |
Recent increases in energy consumption and the growing demand for carbon reduction in our country have led to heightened interest in floating offshore wind power. This study investigates the effect of trench formation around suction anchors on the pullout capacity of floating offshore wind turbine suction anchors by performing soil pressure calculations and numerical analyses. The trench near a suction anchor installed in sandy soil is modeled as a V-shape, and a numerical analysis is conducted to calculate the pullout capacity of the suction anchor, considering factors such as trench depth and whether there is soil erosion around the trench. The maximum depth of the trench occurs up to the pad-eye level, with most of the trench formation occurring up to half of the pad-eye depth. The numerical analysis using Midas GTS NX finite element analysis was performed to calculate the changes in pullout capacity with varying trench depths and local or overall soil loss. The results show that the formation of the trench reduces the pullout capacity of the suction anchor in sandy soil. As the trench depth increases, the pullout capacity of the suction anchor decreases, and when the trench is formed overall (rather than locally), the reduction in pullout capacity becomes more significant. Through this study, it was recognized that trench formation around suction anchors of floating offshore wind turbine foundations can affect the pullout capacity of the anchor. It is expected that by developing appropriate solutions, this research will contribute to the advancement of environmentally friendly renewable energy generation using floating offshore wind power. |