Dynamic Response Analysis And Simulation Of Shell Of Revolution

The research on the dynamic characters of the fusee of a torpedo (supported by the CSIC-No.705 Research & Development Institute) has been developed by the author and the advisor. The finite element analysis programs are employed for modeling and simulation and analysis on the dynamic response characters of the cylindrical shell. Some significative conclusions were obtained. The history and advance in the researchs of the dynamic response and buckling of cylindrical shells under axial impact loading are reviewed comprehensively at first. The main comments are systematically remarked on the dynamic response and buckling of the cylindrical shells, the achievements and advances in domestic and international studies on dynamic buckling of the cylindrical shells subjected to fluid-solid impact loading. Then several buckling criterions are introduced. Then the bending moment theory, the non-bending moment theory and the increment theory employed separately in solving static problems and dynamic problems in cylindrical shells are presented. Several computational examples are solved with these theories. Under the dynamic loads mentioned in the paper, it is found that the axial displacement of the cylindrical shell at the impact point is more than that at the middle. And the axial displacement of the cylindrical shell imposed by the rectangular loading is the most, that imposed by the triangular loading is the least. The finite element analysis program of MSC.PATRAN and DYTRAN are employed for the simulation and analysis on dynamic response characteristics of a torpedo impacting the plate. With several different impacting modes, the specified positions' accelerations that vary with the time of the torpedo body are computed. The dynamic simulation modeling methods of a torpedo impacting the plate are discussed. Some feasible methods are found.With the finite element analysis program of MSC.DYTRAN, the process of the torpedo impacting water is simulated. From the different height of 0.5 meter, 1.0 meter, and 1.5 meter, the specified positions' accelerations that vary with the time are obtained. Comparing the peak values of accelerations with the experimental results, it found that they are very close.