全海深双球连接耐压舱的结构设计探索

钛合金耐压球壳被广泛地应用于大深度载人潜水器.但是,由于受到材料强度的限制,若采用成熟的Ti-6Al-4VELI来设计3人型的全海深载人舱,其壁厚将超出很多国家的现有制造能力.为了解决这一矛盾,该文提出了一种新的双球连接的方案,并以中国船级社最新的强度标准作为优化约束条件,用有限元分析法对这种结构形式进行了优化设计.最后,对双球结构方案与传统单球方案作了比较.

Structural Design Exploration on Double Intersecting Spheres Manned Pressure Hull of Full Ocean Depth

Titanium alloy spherical pressure hull is widely used for deep-sea manned submersible. However, due to constraint of strength of titanium alloy, if full-ocean-depth submersible is designed to have enough volume to take three occupants and Ti-6Al-4V ELI is used, pressure hull thickness will exceed current manufactural ability of most countries. To solve this problem and explore possi-ble form of full-ocean-depth manned pressure hull, based on finite element analysis (by ANSYS), a novel pressure hull structure of double intersecting spheres is proposed, and an optimization for this structure is carried out. Strength under operating pressure and ultimate strength are used as design constraints to ensure structural strength of the whole structure. Also, a comparison between pressure hull forms of the double intersecting spheres and traditional single sphere is presented.