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球形转裙结构是潜水器结构上常见的一种对接装置,能够在大倾斜角度下与对接平台进行水下对接.但大倾角的存在降低了转裙的密封性能,因而有必要研究大倾角下转裙活动法兰处的密封性能.本文针对45°对接角度下的球形转裙结构,利用有限元方法详细分析了转裙活动法兰之间接触应力的分布规律.分析中考虑了对接深度、转裙旋转角度和海流等因素的影响,由此得到了一些有用的结论,为该类结构的密封结构设计与密封性能分析提供参考. 相似文献
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[目的]为有效降低矩形耐压舱顶甲板的弯曲应力,[方法]提出在耐压舱内部设置预应力支柱。首先,给出支柱布局及尺寸已定的情况,以支柱预应力为设计变量,顶甲板板架弯曲应力为目标函数,建立考虑支柱应力约束的支柱预应力最优配置数学模型;然后,进一步将支柱位置作为设计变量,进行支柱布局及其预应力配置优化设计;最后,在预应力优化结果的基础上提出一种降低支柱结构重量的设计思路。[结果]优化结果表明,合理配置支柱的预应力,在支柱重量不增加的前提下顶甲板板架弯曲应力值降低了21.6%;进一步优化后,最终的支柱优化设计方案使顶甲板板架弯曲应力进一步降低了16.0%。[结论]研究结果可为类似结构设计提供方法参考和设计借鉴。 相似文献
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An improved spherical, movable transfer skirt for autonomous submersibles has been devised. It was designed to permit the
transfer of equipment and personnel from a submersible to the pressure chamber of an oil storage sea-bed structure. It also
allowed mating at large vertical angles while the submersible remained horizontal. Seal failure modes and procedures for analyzing
the sealing ability of the mating flange of the hull transfer skirt were thoroughly analyzed using conservative estimation
methods. In the analysis, sea currents and mating angles were considered. Results showed that when considering the effects
of currents, spherical radius and mating angle, their influence on seal ring failure should be considered first. The critical
mating depth for a seal ring failure was larger than for either sliding or rotational failure modes. The critical mating depth
can be used to determine the mating method of the submersible. The analytical procedures and results can be used as a reference
for the design of spherical hull transfer skirts. 相似文献
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