矩形耐压舱预应力支柱优化设计

陈静1，余恩恩2，卢骏锋1，程远胜2 1 430064中国舰船研究设计中心，湖北 武汉2 430074华中科技大学 船舶与海洋工程学院，湖北 武汉

陈静，余恩恩，卢骏锋，程远胜

摘 要：［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， 16.0%。［结论］研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 究结果可为类似结构设计提 供方法参考和设计借鉴。 关键词：内压矩形耐压舱；预应力支柱；支柱布局；甲板板架最大弯曲应力；优化设计

中图分类号：U663.89 文献标志码：A DOI：10. 19693/j.issn.1673-3185. 01089

Optimal design of prestressed pillars for rectangular pressure cabin

Chen Jing1，Yu Enen2，Lu Junfeng1，Cheng Yuansheng2 1 China Ship Development and Design Center，Wuhan 430064，China 2 School of Naval Architecture and Ocean Engineering，Huazhong University of Science and Technology， Wuhan 430074，China

Abstract：［Objectives］In order to effectively reduce the bending stress of the upper deck in a rectangu⁃ lar pressure cabin，［Methods］a scheme of prestressed pillars in a pressure cabin is put forward. First，in the case that the layout and size of the pillars are given，a mathematical model of pillar optimization is pro⁃ posed in which the pre-stresses of pillars are treated as the design variables and the upper deck bending stress as the objective function，and the stress constraints of the pillars are considered. The pillar position is then further treated as a design variable，and the optimization design of pillar layout and prestressed pil⁃ lar configuration is carried out.［Results］The optimization results show that the bending stress of the up⁃ per deck frame is reduced by 21.6% while pillar weight does not increase. Furthermore，the upper deck bending stress further decreases by 16.0% while pillar weight still does not increase.［Conclusions］The research achievements of this paper provide useful references for similar structural design. Key words：rectangular internal pressure cabin；prestressed pillar；pillar layout；maximum bending stress of deck grillage；optimization design