Dynamic Responses of a Slender Offshore Structure Subject to Level Ice Load

J. Ocean Eng. Technol. 1995;9(2):156-166.

Choi Kyung-Sik

平坦氷荷重을 받는 細長形 해양구조물의 動的 거동

최경식

한국해양대학교 해양공학과

Keywords: Design Ice Load, Slender Offshore Structures, 2-D Ice-Structure Interaction, Crushing Failure, Modified Korzhavin's Equation

핵심용어: 설계빙하중, 세장형 해양구조물, 2차원 빙-구조물 상호작용, 분쇄파괴, 수정된 Korzhavin 공식

Abstract

Regrading the development of offshore natural gas field near Sakhalin Island which is an ice-infested area, this study aims to estimate the dynamic ice load for construction of offshore structures operating in this region. In this paper the design ice load and dynamic responses of a slender Arctic structure upon continuous ice movement are sutdied. Crushing agter a certain elastic deformation is assumed as a primary failure mechanism at the contact zone between semi-infinite level ice edge and the face of structure. Dynamic interaction forces are calculated using a modified Korzhavin's equation and a two-dimensional ice-structure interaction model is adopted. To verify the numerical model, dynamic analysis is performed for on of the Baltic Sea channel markers whose response patterns were presiously observed.