The Effects of Local Cavitation and Diffraction on the Underwater Shock Response of an Air-backed 2D Plate Structure with Large Deflections

摘要

The LS-DYNA/USA coupled finite element/boundary element codes are used for predicting the large deflection response of a 2D submerged plate structure subjected to a far-field underwater explosion. The response of the plate and surrounding water is investigated for a range of peak pressures of an incident exponentially decaying acoustic shock pulse. It is shown that the interaction of cavitation and diffraction phenomena result in significant reloading of the plate following reflection of the incident shock.