Abstract The unwanted vibrations of offshore structures induced by wave or earthquake loads can lead to the reduction service life and fatigue failure platforms. This paper introduces tuned inerter damper (TID) a jacket platform as passive control device for mitigating excessive structure loads. An analytical design method is proposed platforms influence installation location on modal response ...

Offshore wind turbine (OWT) support structures are subjected to non-proportional environmental wind and wave load patterns with respect to increases in wave height and with respect to wind and wave combined loading. Traditional approaches to estimating the ultimate capacity of offshore support structures are not ideally suited to analysis of OWTs. In this paper, the concept of incremental wind-...

Due to the efficiency in implementation, the Walsh (Hadamard) transform plays an important role in signal analysis and communication. Recently, Lee generalized the Walsh transform into the Jacket transform. Since the entries of the Jacket transform can be ±2, it is more flexible than the Walsh transform. Both the Walsh transform and the Jacket transform are defined for the case where the length...

As basements of offshore wind turbines (OWTs) in deep water (>50 m), jacket structures are an economic alternative to monopiles. For this reason, the structural durability jackets has become more important. In such structures, welded tubular joints weak points for fatigue design. The harmful effect tensile residual stresses welding is well known. these reasons, and loading were determined by...

A comprehensive investigation of the directional bending performance a 4-leg jacket substructure, supporting 3 MW offshore wind turbine, has been carried out in this study. The substructure with Pratt bracing system which is already installed southwest farm South Korea chosen as reference support structure. numerical model 3MW structure (i.e., tower, transition piece, and structure) configured,...