압력조절 부설법에 관한 실험적 연구

The experiment on pressure controled pipeline laying method which has advantage of reducing the top tension of pipeline is performed. Top tensions and strains along pipeline length according to injected pressure at a static position are measured to investigate the tension variation by the pressure with strain gauges and FBG sensors respectively. Static tensions for all cases increase, which is adverse for the expected effect by the pressure controled laying method. The fail to show the effect of pressure controled laying method comes from the Inequality of pipe material. On the condition of top excitation with a period and amplitude, the height of top tension response shows to be decrease with pressure increase. The adverse effect by VIV for a certain excitation period should carefully be considered in the design of pressure controled pipeline laying method