Vibration Response of Ship Hull at Impulsive Force

Abstract

This paper examines impulsive force given to a hull at the time of underwater explosions and transient vibration response of a hull when this impulsive force is given to a hull. We divided the hull by several sections in its length direction and calculated impulsive force against each divided section as a time history function. As for transient vibration, we applied impulsive force calculated in advance, as forced power, to a calculation model of substituting hull structure to lumped mass and variable cross sectional beam. As for impulsive force, we calculated by setting 9 condisions as charge weight (TNT) as 1,000kgs and explosive and hull's distance as a parameter. We clarified transient vibration character against these 9 condisions.