Numerical Computations on Hydroelastic Response of a Vertical Cylinder in Extreme Wave Loads

Kyoung, Jo-Hyun; Hong, Sa-Young; Kim, Byoung-Wan

Journal of Navigation and Port Research 2007;31(1):21-27.
Published online February 28, 2007.

유탄성 응답을 고려한 수직 실린더에 작용하는 극한파의 파랑하중 수치해석

경조현, 홍사영, 김병완

Numerical Computations on Hydroelastic Response of a Vertical Cylinder in Extreme Wave Loads

Jo-Hyun Kyoung, Sa-Young Hong, Byoung-Wan Kim

Abstract

The wave load and its influence on the response of offshore structure have been well investigated through the statistical approach based on the linear theory. The linear approach has a limitation to apply the extreme condition such as extreme wave, which corresponds to extreme value of wave spectrum The main topic of present study is to develop an efficient numerical method to predict wave load induced by extreme wave. As a numerical method, finite element method based on variational principle is adopted. The frequency-focusing method is applied to generate the extreme wave in the numerical wave tank The wave load on the bottom mounted vertical cylinder is investigated The hydroelastic response of the vertical cylinder is also investigated so as to compare the wave loads with the rigid body case in the extreme wave condition.

Key Words: Extreme wave;Frequeney focusing;Hydroelastic response;Wave load;Fintie element method