A finite element method using subregion variational principle and spline function in this paper is presented to solve the problem of combined shell of revolution.

本文提出一种用分区变分原理和样条函数相结合的有限元方法，解决组合型旋转壳受力分析问题。

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And then obtained the modification model of sensor shell with sufficient accuracy by adopting the combined modeling method of experimental modality analysis and finite element modeling.

然后采用实验模态分析和有限元建模相结合的建模方法，获得了足够精度的传感器壳修正模型。

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The influence of the oxygen balance of pyrotechnical combustion agent and the structure of its rare earth metal shell on the burning performance of the combined combustion element were studied.

分析了烟火燃烧剂的氧平衡及稀土壳体的结构对复合燃烧元件燃烧性能的影响，提供了复合燃烧元件的各项物化性能数据。

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