水压工况下船底结构拓扑优化设计

Pressure hull structural topology optimization design conditions

针对典型的船底结构,考虑其在水压工况下的特殊环境,本文研究船底结构拓扑与形状优化设计。首先,为了让结构重量在水压工况的标准下能够尽量减小,本文对船底结构的形状以及尺寸进行改进,使其船底结构的尺寸缩减了14.19%;其次,为了让船底结构的空间布局更加合理,对船底结构进行拓扑优化,增加船底结构的固有频率。通过模态分析,研究船底结构的应力约束,将得到的固有频率作为拓扑优化过程中的目标函数。研究结果表明,优化后的新船底结构在水压工况下布局分布更加合理,并且有利于船底的仪表仪器安装以及线路的铺设等。

Typical bottom structure,consider the pressure conditions in a special environment,we studied the shape of the bottom structure and topology optimization. First,to make structural weight in water pressure under the standard conditions can be as small as possible,the paper size and shape of the bottom structure has been improved to reduce the size of the bottom structure of 14. 19%. Secondly,in order to make space for the bottom structure more rational layout of the bottom structure topology optimization,increasing the natural frequency of the bottom structure. By modal analysis,natural frequency stress constraints bottom structures of research,will be used as the topology optimization objective function. The results show that the new bottom structure optimized hydraulic conditions in the distribution of the layout is more reasonable,and beneficial to the bottom of the laying and installation of instrumentation lines and the like.