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대규모 폭풍에 대한 Tension Leg Platform의 신뢰도해석
朴佑善(Woo-Sun Park),尹禎邦(Chung-Bang Yun) 한국해양공학회 1991 韓國海洋工學會誌 Vol.5 No.1
This paper presents a method of the reliability analysis for a tension leg platform(TLP) in severe storm waves by using the first passage concept of the random tensile stress in the tendons. In the present method, two failure conditions are considered ; i. e., the excee-dance of the ultimate tensile capacity and the occurrence of the negative tension. In order to consider the correlation effects between the failure events for each corner resulted from the rupture of all tendons at one corner, a new system limit state for a rectangular shaped TLP is developed, which is defined in terms of the TLP motions in the vertical plane ; i. e., heave, roll, and pitch. To illustrate the validity of the present method, the numerical analysis is carried out for two TLP's with different structural dimensions. Then, the results are compared with those by other methods.