Numerical Simulation of Arch-type Submarine Cable Protector under Anchor Collision

J. Ocean Eng. Technol. 2009;23(1):96-103.

Woo Jin-Ho,Na Won-Bae,Kim Heon-Tae

Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University,Department of Ocean Engineering Pukyong National University

아치형 해저 케이블 보호 구조물의 앵커 충돌 수치 시뮬레이션

우진호,나원배,김헌태

부경대학교 해양공학과,부경대학교 해양공학과,부경대학교 해양공학과

Keywords: Submarine cable protector, Anchor collision, Numerical simulation

핵심용어: 해저케이블 보호공, 앵커 충돌, 수치 시뮬레이션

Abstract

In 2006, Jeju Island in South Korea experienced a crisis, no electricity for three hours anywhere in the entire island. This incident was caused by a domino effect that occurred after one of the submarine power cables connecting the island to Haenam, a coastal city on the mainland, was damaged by an external load, probably from a ship anchor or a steel pile being used in marine farming. This study presents a collision analysis of a new submarine power cable protector called arch type reinforced concrete. For the analysis, a dynamic finite element program, ANSYS AUTODYN, was used to examine the displacement and stress of the submarine power cable protector using different material models (RHT concrete model, Mohr.Coulomb concrete model). In addition, two reinforcing bar spacings, 75 mm and 150 mm, were considered. From the analyses, the effects of the parameters (concrete model and spacing) on the results (displacement and stress) were analyzed, and the relations between the damage and parameters were found.