球形封头(qiuxingfengtou)也称为球冠型封头，是以球壳的球冠部分所形成的封头，有半球形封头和无折边球形封头两类。
通过应力分析，给出了带法兰的无折边球形封头的计算方法。
By stress analysis, this article gives a calculation method on a spherical cap joining the flange ring by welding.
本文就无折边球形封头的适用范围、工作环境及结构设计进行分析讨论。
The application scope, working condition and structural design of the sectional spherical head were analyzed and discussed in this article.
由经典力学理论，对于球形封头开孔应力集中问题，大都采用近似计算公式。
According to the theory of classical mechanics, the problem of stress concentration of open cell of spherical cover end is always solved by approximate computing formula.
应用推荐