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,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16.0%。[结论]研究结果可为类似结构设计提供方法参考和设计借鉴。
[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.
作者
陈静
余恩恩
卢骏锋
程远胜
Chen Jing;Yu Enen;Lu Junfeng;Cheng Yuansheng(China Ship Development and Design Center,Wuhan 430064,China;School of Naval Architecture and Ocean Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)
出处
《中国舰船研究》
CSCD
北大核心
2019年第1期102-106,共5页
Chinese Journal of Ship Research
基金
国家部委基金资助项目
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
rectangular internal pressure cabin
prestressed pillar
pillar layout
maximum bendingstress of deck grillage
optimization design
