承受静水外压作用的圆柱形壳体结构优化设计

加强圆柱壳是最重要的深海耐压结构形式之一,是深海装备和人员安全的基础保障以及设备发挥正常功效的载体.水下的工作深度越深,耐压结构承受的海水外压力越大,对耐压结构的强度与稳定性的要求就越高,迫切需要开展结构优化设计,减轻结构自重,提高有效负载.文中分别采用快速下降算法和遗传算法,在保证耐压结构强度和稳定性以及满足基本加工工艺要求的条件下,进行耐压柱壳结构优化设计,所得计算结果对于耐压结构设计具有指导作用.

Optimum Design of Cylindrical Shells under External Hydrostatic Pressure

The stiffened cylindrical shell is one of the most important pressure hull structures which provide safety guarantee for the crew and devices as the fundamental platform of the equipments normally working in deep sea.It is necessary to carry out the structural optimization to decrease the structural weight and increase the effective payload. In this paper, the gradient based methods and genetic algorithms of optimization are employed respectively to perform the optimal design of pres-sure cylindrical shell under the requirements of the strength and buckling and the basic fabrication technology. The obtained results are useful for practical design of pressure cylindrical shells, espe-cially for shell scantlings and stiffener arrangements of ring-stiffened cylindrical shells.