Features of Energy Distribution of Underwater Target by Underwater Explosion

Based on the experimental data of an underwater target bombed by underwater explosion, the energy was studied by means of monitoring interior acceleration signals and wavelet packet analysis with high resolvability and localization. By using the monitored signals, the time-frequency distributions and the energy distributions in blasting frequency bands were obtained. Considering the close relation between energy distribution for different frequency bands and the damaged target effect, the peak acceleration, the energy on dominant frequency bands and natural frequency bands of interior device were taken into account as discrimination factors. A discrimination model was proposed and the re-substitution method was used to verify the stability of model. The results show that the predicted results are consistent with actual values, and prove that the choice of bands energy as an damage index is reasonable.