T700纤维缠绕发动机壳体力学性能分析及优化设计

利用网格理论计算纤维缠绕固体火箭发动机壳体的基本尺寸,建立有限元模型,施加边界条件,在壳体承受内压的情况下,分析应力应变结果云图,研究容易发生失效的部位;采用有限元优化设计软件中尺寸优化的方法,在满足使用设计和使用需求的前提下,对纤维缠绕壳体进行质量优化,分析优化后的结果,研究单层厚度的变化,并对优化后的结果进行强度校核.结果表明:优化后的纤维缠绕壳体质量减轻12.09％,强度校核的结果满足设计使用需求,优化方法设计安全合理,为纤维缠绕发动机壳体的优化设计提供理论基础.

Mechanical property analysis and optimum design of T700 filament wound engine shell

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.