双壳散货船结构强度评估及结构重量优化

Evaluation of strength for double hull bulk carrier structure and optimization of hull weight

为了对双壳散货船进行结构强度评估,文章以一艘散货船为例,采用进化算法对中剖面进行了优化设计,并运用剪力流法分别对单、双壳2种结构形式计算船舶中剖面结构各节点处的剪应力.结果表明,双壳结构可以大幅度降低舷侧结构、顶边舱和底边舱处的剪应力,并且通过运用优化技术,双壳结构重量可减至与常规的十分接近单壳结构.

Research was done to evaluate the strength of a double hull bulk carrier structure and its optimum hull weight. The midsection of a double hull bulk carrier was optimized using the evolutionary computation, and the shear stress of a single-hull and double-hull structure was calculated respectively using the method of shear flow. The result indicates that the weight of a double hull bulk carrier can be reduced to a reasonable amount in comparison with existing single hull types, and the shear stresses of the side shell, top, and hopper tank are decreased significantly by using a double-hull structure.