A new method to predict the permanent deformation of rectangular plates based on shock energy compensation.

The response of plate subjected to underwater explosion loading is of major concern in a variety of marine, ship and offshore platform applications. This paper first conducts the theoretical analysis of the shock loading acting on the plate exposed to underwater explosion. Thereafter, an effective numerical method is adopted to compute the central plastic deformation of the rectangular plates shocked by primary shock wave without regard to the modeling of surrounding water. Therefore numerical computation efficiency is highly improved. Due to the disregard of the gas bubble pulsation energy, numerical central deflections of the rectangular plates are less than the experimental results. Thus, an energy-modified method is advanced to modify the numerical results according to the energy distribution during underwater explosion. The comparison of two types of modified numerical predictions with experimental results piece-wise shows good agreement. [ABSTRACT FROM PUBLISHER]