スロッシングによる衝撃圧力を受けるLNG船防熱構造の流体・構造連成解析

概要

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In membrane type LNG carriers, impact pressure arises due to sloshing. High pressure is calculated by sloshing analysis assuming tank wall to be rigid. However, it is known that flexibility of a tank wall structure would mitigate this high pressure. In this paper mitigation effect of slosing pressure was investigated by using dynamic analysis code MSC/DYTRAN. In the first, to simulate and evaluate basic behaviors of fluid-structure interaction, 1-dimensional models which consisit of a fluid-part and a structural-part were analyzed. From these analyses it was found that mitigation effect could be simulated. Then, this analysis method was applied to an insulation structure of LNG tank. As a result, impact pressure was mitigated to about a half level due to flexibility of the insulation structure compared with rigid wall.
社団法人日本船舶海洋工学会の論文
1996-03-25