SAFETY OF MEMBRANE TYPE CARGO CONTAINMENT SYSTEM IN LNG CARRIER UNDER ACCIDENTAL ICEBERG COLLISION

摘要

Arctic and sub-arctic regions of Russia have large gas reservoirs. Natural gas extracted from these regions may bernexported to other destinations, such as Gulf of Mexico, through a ship-borne transportation system. In this case, one ofrnkey issues at conceptual and detailed design phase is the integrity and safety of LNG containment systems under thernimpact of an accidental iceberg-ship collision. The collision impact by an undetected iceberg should be considered to bernan accidental load. Thereby, plastic deformations of the hull structure may be accepted provided the LNG will not leakrnout. Till now, view points of the safety evaluation have been limited to structural hull deformations by the collision.rnThey have not examined effects of acceleration and vibration induced by the impact on the structure of LNGrncontainment systems. In this paper, evaluations of the structural safety are focused on the response of LNG containmentrnunder impact-induced acceleration and vibration in case of a 150K class Mark Ⅲ type LNGC.