考虑初始形状影响的耐压球壳临界载荷简化计算公式

摘要

文章研究了在载人深潜器结构中承受高压、保障潜员安全的耐压球壳。文中通过对经典理论公式的分析和合理假设，引入几何修正系数k细化了球壳临界载荷计算表达式，该几何修正系数体现了球壳本身的初始形状，如初挠度、局部不圆度及板厚减薄等因素对其的影响。并通过回归分析得到计算数据与试验值吻合较好。同时，运用该公式对钛合金球壳临界载荷进行预报，同样有较高精度。%The spherical pressure shell main structure of manned submersible which is under great pressure and provides the security of human is researched. A new formula for calculating critical load of the spheri-cal shell which bases on classic theory and considers the correction coefficient k is introduced. The influ-ences of initial shape are shown, for example, initial deflections and out-of-roundness and thickness thin-ning in the manufactory technical, etc. The calculated data agree well with the experimental data by the re-gression analysis. The critical load of titanium spherical shell predicted by this formula is very precisely.