In this study, the dynamic strength characteristics of LNG (liquefied natural gas) insulation system are analysed based on a series of impact tests in quantitative manner. A custom-built type dry drop test facility has been developed for the measurement of impact performance of membrane-type LNG insulation system. Based on a systematic data acquisition method, important variables, such as displacement, recovery, impact force, time duration, were successfully obtained. In particular, displacement recovery of RPUF (reinforced polyurethane foam) and the crack occurrences and propagation with respect to the number of drops, which can be used as phenomenological evidence for nonlinear mechanical behaviour under the impact loading, were measured. It is revealed that the type of KC-1 LNG insulation system has more anti-cracking ability than MARK III type insulation system. The amount of reaction force, which reaches at the bottom of insulation panel throughout the thickness, does not exhibit a proportional behaviour to that of impact load. It is expected that the results obtained from this study can be used for the robust design and verification of numerical analyses of LNG insulation system.
Experimental investigation on the impact behavior of membrane-type LNG carrier insulation system
2009
7 Seiten, 11 Bilder, 4 Tabellen, 4 Quellen
Conference paper
English
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