Response Analysis of Deep Ocean Risers to Vortex-Shedding by Numerical Analysis

J. Ocean Eng. Technol. 1999;13(Suppl DB Error: no such field):65-72.

Park, Han-Il;Cho, Hyo-Je;Jung, Dong-Ho;

수치해석에 의한 심해용 라이저의 와동방출 응답해석

박한일;조효제;정동호;

한국해양대학교 해양과학기술대학;한국해양대학교 해양과학기술대학;한국해양대학교 대학원;

Keywords: Deep-Ocean Mining Riser Pipe, Vortex Shedding Finite Element Method, Reduced Velocity

핵심용어: 심해용 라이저, 와동방출, 유한요소법, 감소속도

Abstract

A deep-ocean mining riser pipe is subjected to floating vessel motion as well as environmental forces arising from currents and waves. The dynamic analysis is carried out for a deep-ocean mining riser pipe by using a finite element method. The vortex shedding which excites risers in a direction perpendicular to the flow and induces transverse response is considered. It is demonstrated that transverse displacements due to vortex shedding is greatly increased in lock-in regions. The result of this study is compared with other results having good agreements.