The Dynamic Response Of The Cylindrical Shell Subjected To UNDEX

The dynamic response of submarine subjected to explosion (UNDEX) was so complex that became one of the key technologies to anti-explosion, and played an important role in submarine rescuing design. The dissertation studied the cylindrical shell with sound absorption material stuck to the outer hull and the composite cylindrical shell did numerical calculation and experiment research about dynamic response on UNDEX.First, the Reflected-After flow Virtual-Source model (RAVS) was researched. At the same time, the formulation of fluid-structure interaction and the expression of velocity of shell were got. The problem about the outer fluid dynamic pressure on infinite long cylindrical shell in UNDEX was solved, which became the base of dynamic response on different shell structure.Then, the above theory and Flugge were introduced to analyze the computation procedure about UNDEX response of an infinite long cylindrical shell for different types such as single layer, double layer, and composite material. The comparison of calculation showed that RAVS model gave a good approximation.At last, experimental validation of the computation methods was done. The UNDEX experiments were performed on the cylindrical models with and without the sound absorbing layer. The experimental results were compared well with calculated results. At the same time, some useful conclusions were got just as the elastic cylindrical shell could decrease the wave shock.The dissertation presents a new formulation for solving the UNDEX dynamic response of cylindrical shell with sound absorption material stuck to the outer hull. The formulation could be further combined with experiment results to obtain a theoretical and empirical mixed method for concept design stage.