Ships and Offshore Structures, 2025, Online
Title: A new method for determining the design values of wave-induced vertical bendingmoments acting on ship-shaped offshore installations in survival conditions
Author(s): Hyeong Jin Kim, Yue Gu, Yeon Chul Ha and Jeom Kee Paik
Abstract:
The aim of this study is to develop a new method for determining the design values of wave-induced verticalbending moments acting on ship-shaped offshore installations in survival conditions. Although theguidelines of classification societies are useful for determining the design values, considering survivalconditions with the most probable extreme waves for a return period of 100 years, the determination oftheir design values is not straightforward owing to the complex procedures and a large amount ofhydrodynamic analyses which require significant computation time. In this paper, a new method isdeveloped to determine the design values of wave-induced vertical bending moments for ship-shapedoffshore installations in survival conditions. As an applied example, a very large crude oil carrier (VLCC)-class floating, production, storage, and offloading (FPSO) unit in survival conditions are considered at sixdifferent seas. A comparison is made among the present solutions, environmental contour-basedsolutions, and the long-term stochastic method-based classification society rule values.