In this study, the safety of floating liquefied natural gas (FLNG) hull structures in collisions with icebergs in an Arctic environment is examined through experimentation and LS-DYNA numerical computations in association with normal and accidental conditions in operation of LNG cargo containment system. The material properties of Polar-class high-tensile steel at the low temperatures associated with an Arctic environment and liquefied natural gas-induced cryogenic conditions are characterized by tensile coupon tests under quasi-static and dynamic conditions. The structural crashworthiness of plate panels subject to impact loads is studied through an experiment and numerical computations at low temperatures. The technologies and insights provided by this study at the material and structural member levels are then applied to FLNG hull structure collisions with icebergs in an Arctic environment.

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