Abstract:The concept of ship anti-shock layer in underwater explosion wave isolation is developed based on the impedance mismatch theory. Wave equation and Taylor's flat plate model are adopted to derive fluid-structure interaction equations for the solid layer and the cavity layer. The numerical examples indicate that the ship anti-shock layer can isolate the underwater explosion wave from ship hull. The ship hull shock peak stress, acceleration and shock spectrum are attenuated significantly when the ship hull is covered with the anti-shock layer.