深潜器新型端部鞍形封头的应力解析分析(英文)

Analytical Stress Analysis of the Novel Saddle-shaped End Closure of the Deep-diving Submersible Vehicle

鞍形封头作为一种深潜器新型的端部封头,由圆球壳、环壳和连接二者的强力加强环组成。文章提出了这种鞍形封头在静水压力作用下的应力分析解析方法。根据加强环与球壳、环壳连接处的变形协调条件,依据旋转壳的有矩理论,利用力法计算得到连接处的弯曲内力,然后推导出整个鞍形封头应力分布的封闭解析解。为了验证所提出的理论方法的有效性,针对一个典型的鞍形封头分别用理论法和有限元软件ANSYS进行了应力分析,并将各种应力值进行了比较。比较结果表明,理论结果与有限元结果吻合,文中所提出的理论方法可以用来准确地计算鞍形封头的各种应力,这将有助于这种结构的强度分析与优化设计。

The saddle-shaped end closure,a novel end closure of the deep-diving submersible vehicle,consists of the inverted domed shell,the domed shell and the stiffening ring which connects the former two shell components together.This paper is concerned with the elastic,axisymmetric,stress analysis of the saddle-shaped end closure under axisymmetric external hydrostatic pressure.The moment theory of the revolutionary shell is utilized to obtain the flexural internal forces of the inverted domed shell and the domed shell at junctions with the stiffening ring using the force method according to the deformation compatibility at junctions.The closed form solutions to elastic stress distributions for the saddle-shaped end closure are obtained.To demonstrate the applicability of the proposed analytical method,efforts were made to analyze a typical saddle-shaped end closure using both the analytical method and the finite element software ANSYS and compare the results obtained from different methods.Verification results reveal that the analytical stresses agree well with those calculated using the finite element method.The analytical method can be employed to analyze various stresses of the saddle-shaped end closure accurately,which is certainly helpful to the optimal design of such structure.