INTEGRATIVE DYNAMIC MODEL OF THE SHIP HULL AND EQUEPMENTS SUBJECTED TO FAR FIELD UNDERWATER EXPLOSION
An integrative dynamic model for the ship hull and the shipboard equipment dynamic response due to far field underwater explosion is developed. The model incorporates the Dynamic Design Analysis Method (DDAM) into the Taylor Plate Theory, and enables the shipboard equipment dynamic response analysis to be performed more efficiently. The model is formulated by assuming the ship hull to be a flat plate with an N-mass deck and shipboard equipment attached to the hull. A one-dimensional analysis is used to represent the explosion wave in water. The pressure wave is assumed to be a decaying exponential function. The model can predict the ship hull and the shipboard equipment shock response based on the underwater explosion charge weight, stand off distance, the Ship's Tonnage, principal dimensions, approximate ship hull structure and shipboard equipment mass and support stiffness parameters. The analytical results based on the model are compared to that of scaled ship model underwater explosion experiment results. In general, the spectrum values of the hull motion are similar in shape and magnitude to the experiment.