Dynamic properties of the corrugated stainless steel membrane reinforced with the glass composite pressure resisting structure for LNG carriers

In this work, the corrugation of primary barrier was reinforced with the pressure resisting structure (PRS) of E-glass fiber epoxy composite to increase both the buckling resisting capability of the corrugation and to decrease the tumbling noise and vibration due to the cavitation impact of LNG. The natural frequency and damping ratio of the corrugation with and without PRS were measured, and various damping materials were wrapped around the PRS to determine an optimum vibration suppression structure. Also the impact load transmissibility of the primary barrier with PRS was investigated by the drop weight impact test, from which an optimum combination of PRS and the damping material has been suggested.