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손영준,김윤호,한전식,노준범,최항순 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11
Recently, the development of offshore oil and gas has shifted to what is termed ultra-deep water that exceeds1,500m. Such a situation inevitably involves a high level of risk, strong attention to safety must be paid in the design and operation of offshore structures, including mooring system. Many researchers have developed analytical and numerical methods for analyzing mooring system. In this paper, a mooring system analysis program including the effects of elasticity and bending is constructed based on the Finite Element method. In order to validate the program and also examine the effect of elasticity and bending, the static and dynamic behavior of mooring line is compared with that from the catenary equation. It is found that the effects of elasticity and bending on a mooring line are negligibly small except the case of fast oscillations.
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노준범,윤종근,한전식,정종진,심우승,신현수 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11
The procedure for drilling riser operability assessment is presented. The configuration of drilling riser system and its design specifications in API standard are described. For the operability assessment, static and dynamic analysis is performed to obtain riser behavior and responses using the numerical calculation S/W. A typical drilling riser operating in GOM is considered and the analysis is carried out with respect to combinations of pretension and rig offset. The maximum stress and mean/max inclination angles of riser system are rigorously calculated from simulations and its ratios to allowed values are plotted. The drilling riser operability is presented in a form of diagram showing the area of operable condition.
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