Abstract:Based on the mesh theory, the basic dimensions of the filament wound solid rocket motor shell are calculated, the finite element model is established, and the boundary conditions are applied, when the shell is under internal pressure, the stress and strain results are analyzed and the failure parts are studied; Using the method of size optimization in the finite element optimization design software, on the premise of meeting the use requirements of the design, the quality of the filament wound shell is optimized, the results after optimization are analyzed, the change of the thickness of single layer is studied, and the strength of the optimized results is checked. The results show that the optimized filament wound shell can reduce the weight by 12.09%, meet the design requirements, and the optimization method is safe and reasonable, which provides the theoretical basis for the optimal design of the filament wound engine shell.