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为了使潜水器能够在水下完成各种操作项目,必须为潜水器配置适当的设备以及电缆,这就决定了必须在耐压壳两侧的封头上设置各种大小不同的开孔,开孔处需要安装各类接插件.耐压半球封头上开孔的设置导致了应力的增加和壳体强度的减弱;同时,由于结构的连续性被破坏,这将产生较大的附加弯曲应力.本文利用ANSYS有限元分析软件对开孔半球封头的承载力问题进行了非线性有限元分析,计算了开孔的各项参数变化对耐压封头极限承载力的影响.计算结果表明,随着个数和孔径的增大和围壁厚度的减小其极限承载力呈下降趋势.
In order to enable the submersibles to perform various operations under water, appropriate equipment and cables must be provided for the submersible, which determines the need to set various openings of different sizes on the heads on both sides of the pressure hull Hole at the need to install a variety of connectors. Pressure hemisphere head opening on the hole leads to an increase in stress and shell strength decreased; the same time, the continuity of the structure is destroyed, which will have a greater additional bending stress In this paper, ANSYS finite element analysis software was used to analyze the bearing capacity of open hemispherical head by finite element method, and the influence of various parameters of open hole on the ultimate bearing capacity of pressure resistant head was calculated.The results show that, With the increase of the number and the pore size and the decrease of the wall thickness, the ultimate bearing capacity shows a downward trend.