砰击载荷作用下的双体船湿甲板综合优化

Comprehensive optimization of wet deck of catamaran under slamming load

双体船由于高航速及独特的结构形式,船体湿甲板处受砰击载荷影响较大,其结构安全受到较大的威胁。采用有限元软件Ansys对目标船湿甲板结构进行参数化建模,运用CFD方法分析求解湿甲板处的砰击载荷。以多学科优化软件Isight为平台,集成有限元软件,以湿甲板各位置板厚、桁材与骨材尺寸和数量为设计变量,以结构应力作为约束条件,以湿甲板结构重量为目标函数,开展砰击载荷作用下的双体船湿甲板优化设计。计算结果表明,考虑结构布局的优化可以以更小的代价实现应力分布均匀化和结构轻量化目标。

Because of its high speed and unique structure,the wet deck of catamaran hull is greatly affected by slamming load,and its structural safety is greatly threatened.The parameterized model of the wet deck structure of the target ship is established by using the finite element software Ansys,and the slamming load at the wet deck is analyzed and solved by using the CFD method.Taking Isight as the platform,integrating finite element software,taking the thickness of each position of wet deck,the size and quantity of truss and aggregate as design variables,structural stress as restraint condition,and structural weight of wet deck as objective function,the optimum design of wet deck of catamaran under slamming load is carried out.The calculation results show that the goal of uniform stress distribution and lightweight structure can be achieved at a lower cost by considering the optimization of structural layout.