Annual Journal of Civil Engineering in the Ocean Vol.38
CHARACTERISTICS OF CURRENTS ALONG THE JAPANESE COAST BASED ON JCOPE DATA
2022 Volume 78 Issue 2 Pages I_883-I_888
Details
2022 Volume 78 Issue 2 Pages I_883-I_888
Waves and currents are considered as external forces in the design of offshore wind turbine foundations, but there is little observational data on currents in the open ocean, so estimates must be used as reference. The JCOPE2M is an easy-to-use estimator for the Japanese coast, but it is based on daily mean velocities, so it is recommended to use the highly accurate JCOPE-T.
In this study, the relationship between JCOPE2M and JCOPE-T is summarized, and the possibility of using JCOPE2M as an ocean current for offshore wind power foundation external forces is examined. As a result, it was confirmed that JCOPE2M can be used with appropriate corrections. The vertical profile of currents should be obtained by using the high-resolution JCOPE-T. However, since the effect of the drift current appears in the surface layer, a simple 1/7 power law based on the surface velocity of JCOPE-T is likely to overestimate the vertical profile of currents.
