Theoretical Analysis of the Interaction between the Plate Structure and Strong Shock Wave in Underwater Explosion

To investigate the fluid-structure interaction of the one-dimensional strong shock wave with the plate, we took the compressibility of fluid and structural material into account and, by introducing state of equation of water and structural material into our theoretical analysis, obtained the reflected wave front parameter and reflection coefficient.Then, we established the motion equation of the plate according to the law of conservation of momentum and calculated the plate's wall pressure and velocity histories.Furthermore, on the basis of these results, we came up with an approximate formula for estimating the impulse transfer ratio of the interaction between the strong shock wave and the plate.Finally, we verified the theoretical approach to the shock-structure interaction by carrying out an underwater explosion experiment accompanied with numerical calculation.The results show that the theoretical method proposed here is in good agreement with experimental and numerical results.The method provides a theoretical basis for research on problems of close-in underwater explosion acting on the broadside structure.