45万吨级超大型矿砂船全船结构有限元分析

Finite Element Analysis of Ship Structure of 450000DWT Ultra-Large Ore Carrier

超大型矿砂船由于船体结构的特殊性和船体本身的超大型化,使船体强度校核很难用常规规范中的梁理论方法或舱段有限元计算确定.在研究超大型矿砂船全船分析的基础上,探讨了超大型矿砂船全船结构有限元模型和质量模型的建模方法、波浪载荷和舱内货物载荷计算方法及解决全船载荷动态平衡的惯性平衡处理技术.以一条45万吨级的超大型矿砂船为例,完整实现了全船有限元分析全过程,计算出各个工况下的船体变形和应力,对正确地进行超大型矿砂船全船结构强度直接计算具有指导作用.

Because of the special structure and ultra large scale, normal methods like beam theory in rules and cargo hold FEM can＇t be applied directly to correctly analyze the global hull strength of ultra large ore carrier. Based on the study of whole ULOC analysis by FEM, methods of setting up structural finite element model and mass model, calculating wave loads and describing internal load distribution and technique of achieving inertia balance for the dynamic balance of whole ship loads are developed. Taking a 450K deadweight ton ULOC as an example, the whole ship hull analysis is completed with the results of hull relative deformation and stress in different load eases. This paper can be guidance to this type carrier on the whole ship analysis of structural strength by FEM.