Session: 02-05-04 Extreme Loads and Responses 4

Paper Number: 127039

127039 - Development of a Practical Design Formula for Predicting the Ultimate Compressive Strength of the Cylindrically Curved Plates Applicable in Offshore Wind Turbine Tower 

This research introduces an empirical formula to predict the ultimate strength of unstiffened cylindrically curved plates under longitudinal compression. Utilising the ANSYS nonlinear finite element method (NLFEM), the study analyses 1000 different scenarios of curved plates, focusing on critical parameters such as flank angle, plate aspect ratio, and slenderness ratio. The adopted model in this study considers the average severity of initial imperfections and operates on a one-bay and one-span basis without factoring in the effects of residual stresses. The results from these simulations serve as the foundation for developing the empirical formula. This proposed formula has demonstrated a strong correlation with numerical simulations and experimental test results, indicating its reliability and accuracy. The findings from this study are precious for structural design, providing a solution for predicting the ultimate limit state (ULS) of cylindrically curved plates in the early design stages. The methodology outlined in the study is comprehensive, encompassing steps such as data collection, defining structural characteristics (i.e., geometric, material properties), selecting reliable scenarios for analysis, calculating the ULS, processing the collected data, developing the empirical formula, and its subsequent validation to ensure its applicability and precision in practical scenarios. The outcome obtained by the present study will be valuable for the ships and offshore structural designers and engineers.

Presenting Author: Do Kyun Kim Seoul National University

Presenting Author Biography: Dr. Do Kyun Kim (D.K. Kim) is an Associate Professor in the Department of Naval Architecture & Ocean Engineering at Seoul National University. He was working with Newcastle University (2019 – 2021) and PETRONAS University of Technology (2014 – 2019) as an Associate Professor. In addition, he was an advisor (= leader) of the Ocean and Ship Technology (OST) research group in UTP since 2015 and has been providing service as an external advisor since June 2019. In 2013, he received a Doctor of Philosophy (PhD) degree from the Pusan National University (PNU), Republic of Korea. His research focuses on nonlinear structural mechanics and analysis in association with limit states and risk-based approaches for “ships and offshore structures”. He has authored more than 100 technical papers, including journals and proceedings. He is now interested in limit state-based structural analysis and design of subsea engineering in terms of floating structures, risers, pipelines and many others.

Authors:

Do Kyun Kim Seoul National University
Andy Ming King Wong PETRONAS University of Technology
Jinha Hwang Pukyong National University
Shen Li University of Strathclyde
Sang Jin Kim National Sun Yat-sen University
Nak-Kyun Cho SeoulTech