多球交接耐压壳结构优化问题的研究

Study of structural optimization problem for multiple intersecting spherical pressure hulls

文章对多球交接耐压壳的结构优化问题进行了研究。通过对一系列双球交接耐压壳进行非线性有限元分析,总结了双球交接耐压壳的两种典型破坏模式。在此基础上,提出了多球交接耐压壳结构优化问题的数学模型,并对不同材料的耐压壳进行了结构优化。优化的结果表明,交接角的大小对最优化结构的重量影响十分微小,而在相同的工作深度下,某钛合金材料耐压壳的最优结构具有最小的重量。此外,文中还对多球交接耐压壳的结构形式进行了推广,提出了三种新的多球交接形式。

The structural optimization of multiple intersecting spherical pressure hulls is studied in this paper. Based on the nonlinear finite element analysis of a series of double-sphere pressure hulls, two typical collapse modes of multiple intersecting spherical pressure hulls are summarized.The mathematical model of structural optimization problem is built and the structural optimization for pressure hulls of different materials is performed.The results show that the intersecting angle has little effect on the weight of optimum pressure hulls and the optimum pressure hulls of titanium alloy have the lowest weight compared with those of other materials. Besides, the form of multiple intersecting spherical pressure hulls is extended and three new shapes are developed.