| Title |
Variation in Pullout Capacity of Suction Anchor of Floating Offshore
Wind Turbine to Seabed Inclination |
| Authors |
김우영(Kim, Woo Young);안제영(An, Je Young);이원효(Lee, Won Hyo);경갑수(Kyung, Kab Soo);김태형(Kim, Tae Hyung) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.3.0365 |
| Keywords |
해저면 경사, 부유식 해상풍력, 석션앵커, 인발지지력, 전단응력 Seabed inclination, Floating offshore wind turbine, Suction anchor, Pullout capacity, Shear stress |
| Abstract |
The pullout capacity of the suction anchor of a floating offshore wind turbine is crucial for the maintenance and operation of the
structure. Therefore, various factors are considered when designing and installing the anchor. Among these factors, this study
investigated the effect of seabed inclination on the pullout capacity of the suction anchor was investigated using both geometric
methods and finite element analysis. According to geometric analysis, unlike flat ground, shear stress (τ) occurs on inclined seabed,
and the seabed inclination angle (α) directly affects the horizontal and vertical components of the load, altering the horizontal force
(H) and vertical force (V), which leads to a reduction in the pullout capacity of the anchor. The results of numerical analysis also
showed, similar to the geometric analysis, that the pullout capacity of the anchor decreases as the seabed inclination increases.
However, unlike the geometric analysis, the numerical analysis reflects characteristics such as the cohesion of the ground and the
interface elements between the anchor and the ground, resulting in different outcomes from the geometric analysis. Based on the results
of both methods, the allowable seabed inclination was determined to be 5°, considering the reduction in pullout capacity. For steeper
inclinations, further geometric or numerical analysis is required. As a result, since seabed inclination is significantly related to the
pullout capacity of a suction anchor for a floating offshore wind turbine, it is necessary to consider the change in pullout capacity based
on the inclination angle during installation. |