Presented herein is a transient response analysis of a VLFS (Very Large Floating Structure) due to impulsive landing of an airplane by Finite Element Method. The wave absorption filter which consists of sponge layer and Sommerfeld boundary is applied to open boundaries with irregular waves, and has been found to be efficient. The dynamic deflectional configuration caused by the landing of an airplane appears to be axisymmetric with respect to the point of landing for a few seconds after the

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... ing; however, after that, the response becomes non axisymmetric depending on the shape of the floating body.