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- 검색키워드
- 저자 : 명노현 (검색결과 3 건)
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다목적 해양작업 지원선 갑판구조의 중량물 낙하사고 안전설계에 관한 연구
Due to the rapid growth of the offshore field, particularly in the exploration and development of offshore oil and gas fields in deep waters of the oceans, the science and engineering in this area is seeing a phenomenal advancement. During their lifetime, ship and ship-shaped offshore structures are exposed to various types of environmental phenomena which can be categorized into accidental-related problems (fire, explosion, collision, grounding, dropped object and others), age-related problems (corrosion, fatigue cracking and local denting damage) and others. Various types of phenomena may occur in different scenarios with different mechanisms, but it is interesting to mention that all of them commonly give rise to nonlinear structural consequences that involve both geometric and material nonlinearities. In the various accidental issues, this study focuses on the dropped object accidents because a multi-purpose offshore construction vessel (MOCV) mainly using the offshore crane is selected for the target structure, and therefore a safety design is required in accordance with a dropped object accidents during the operation of crane. In this study, the procedure for a safety assessment is established for dropped object accidents considering the deformation, fracture and penetration problems of deck structure in accordance with the shape, weight and height of dropped objects. In the meantime, a safety design criterion is defined, and a safe design for the crane operation to meet criteria is proposed with the result of nonlinear finite element analysis using LS-DYNA. Finally, it is also expected to be helpful in future studies involving dropped object by providing a procedure for safety design for dropped object accidents and introducing a theoretical background for energy and fracture.
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