Study on Strength of LNG Carrier against Ice Impact

抄録

This paper proposes the methods of structural assessment of Arctic and sub-Arctic LNG carrier with different extreme ice load scenarios. First, iceberg (bergy bit) collision at midship and shoulder part in forward region are investigated assuming a normal or lower ice class LNG carrier. The shoulder part collision case, which is considered more critical, is analyzed with estimated absorbed energy from an actual damage record. Second, global strength in ramming operation of an ice breaking LNG carrier is investigated using a whole ship FE Model combined with global shear force. Finally, numerical simulations with special types of elements are carried out to take into account the ice crushing behavior.The authors conclude that, the proposed methods are very useful for strength assessment of ship in Arctic and sub-Arctic region,and spherical type LNG carriers are suitable to the concerned regions.