藕节形大深度潜水器耐压壳体优化设计

Optimum design of multiple intersecting spheres great deep-submerged pressure hull

藕节形切弧连接耐压壳体是大深度潜水器耐压壳体的一种新型结构形式。该文考虑初始缺陷和材料、几何非线性的影响,参考潜艇规范,采用外点罚函数(OPF)法的结构优化程序,研究了三藕节切弧连接耐压壳体的优化设计。在研究中,设计变量为耐压壳体的厚度半径比、球壳间距半径比、连接角,考虑强度、稳定性以及几何约束,使浮力因子最小。同时研究了设计变量在结构优化设计中的敏感性,以及设计变量对耐压壳体的浮力因子、强度和稳定性的影响。文中的研究结果可以为藕节形大深度潜水器耐压壳体的结构设计提供参考。

Multiple intersecting spheres tangent arc connective pressure hull is a new structural style of great deep-submerged pressure hull. Considering the effect of material nonlinearity and initial deflection, and referencing for the specification,the optimum design of the three intersecting spheres tangent arc connective pressure hulls is investigated by the optimization procedure of out penalty function method. In this study, the thickness-radius ratio, the length-radius ratio of the spherical shell, and the angle of intersection of the spherical shell are selected as design variables,and the strength,stability and boundary constraint are considered to minimize the buoyancy factor.Additionally, a sensitivity analysis is performed to study the influence of the design variables on the structural optimum design and the effect of design variables on the buoyancy factor, strength factor and stability is also studied. The research production of this paper provides a reference for the structural design of this new structural style of pressure hull.