单位容积重量是水下耐压壳体设计轻量化的一个重要指标，单位容积重量越低，结构可装载人员及重量越多，深海操纵及紧急上浮安全性越高。本文首先建立了600 MPa级高强度钢环肋圆柱壳结构无量纲的优化计算方法。以多学科优化软件Isight为平台，联合利用多岛遗传算法（MIGA）和序列二次规划法（NLPQL）对高强度钢环肋圆柱壳单位容积重量进行优化，得到了最小环肋圆柱壳单位容积重量、最优的半径厚度比与最大工作压力的关系曲线和拟合公式。该公式为深海耐压圆柱壳优化设计和评估提供参考依据。
Weight per unit volume is an important indicator of undersea pressure hull with light weight design. The lower weight per unit volume of the structure can have, the more goods and staff it can load, the safer it can be for manipulation and floating. Based on this method, Isight, a multidisciplinary optimization software, is usedto reach the optimized weight per unit volume of ring-stiffened cylindrical shell, which is made of high strength steel. Both multi-island genetic algorithm (MIGA) and Sequential Quadratic Programming method (NLPQL) is adopted to search optimization results. Based on optimization results, a fitting curveand formula of weight per unit volume and maximum working pressure, as well as a fitting curveandformula of radius-thickness ratio and maximum working pressure, is put forward for ring-stiffened cylindrical shell made of 600MPa level high strength steel. These formulas can set foundations foroptimal design and assessment of deep-sea ring-stiffened cylindrical shell.
2018,40(7): 11-16 收稿日期：2017-12-28
DOI：10.3404/j.issn.1672-7649.2018.07.003
分类号：U661.4
作者简介：余俊(1987-),男,工程师,主要从事舰船结构优化设计
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