The Motion Characteristics of a Marine Riser in Regular Wave Condition

J. Ocean Eng. Technol. 1987;1(1):49-56.

규칙파중 석유시추보호관의 운동특성에 관한 연구

김용철,이판묵

한국기계연구소 대덕선박분소 해양공학실,한국기계연구원 대덕선박분소

Keywords: marine riser, oscillation in water, geometric nonlinearity, vortex shedding, jump phenomena

핵심용어: 석유시추보호판, 접수진동, 기하학적 비선형성, 보오텍스, 이력현상

Abstract

The dynamic behaviour of a marine riser was studied theoretically and experimentally. In linear analysis, the natural frequencies and mode shapes of the riser were obtained from the experiment and they were found to be in good agreement with theoretical results by using a simple asymptotic formula. In nonlinear ananlysis including viscous drag and large displacement, a numerical-perturbation technique based on the derived linear asymptotic solutions is used to predict the displacements and stresses of the riser in harmonic motion. These results were also compared with experimental data and found to be in general in good agreement.