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,...

Offshore platform installation is associated with several inherent risks arising from majorcritical safety challenges such as fires, explosions, blowouts, falling objects, earthquake, extreme weather,and impact from moving objects such as helicopters or ships. These critical problems are due largely to designerrors or inadequacies, and poor maintenance. The safety challenges highlig...

Marine industry requires continued development of new technologies in order to produce oil. An essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. In this study, structural model updating may be defined as the fit of an existing analytical model in the light of measu...

When considering the future of offshore wind energy, developing cost effective methods of harnessing the offshore wind resource represents a significant challenge which must be overcome to make offshore wind a viable option. As the majority of the capital investment in offshore wind is in the form of infrastructure and operation and maintenance costs, reducing these expenditures could greatly r...

Offshore structures are exposed to cyclic loading and thereby at risk of fatigue failure, especially the welded joints between trusses in offshore jacket foundations. In this paper, an optimization framework for considering damages is presented. The can be used optimize orientation location welds connecting joint a K-node damage. It known that longer higher failure compared shorter welds. To ac...

[Purpose] The purpose of this study was investigated the effect of tight clothes on cervical and thoracic spine muscles activities during shoulder abduction. [Subjects and Methods] The subjects of this study were 10 healthy males. The subjects performed two shoulder abduction trials for each of two jacket-wearing conditions. The right upper, middle, and lower trapezius and serratus anterior mus...