基于空腹桁架理论的船体结构腹板开孔强度简化分析方法

大型船舶结构的设计和建造过程中考虑到电缆管路布置及结构轻量化需求,常在主要构件高腹板上开设许多开孔。为快速有效评估高腹板开孔结构的强度特性,本文利用费氏空腹桁架理论和有限元数值方法,分析腰圆形开孔的纵向位置、开孔宽度和长度对开孔周边强度的影响,并对费氏空腹桁架理论作适当修正。结果表明,本文提出的修正公式能够适用于不同尺寸结构,并有效提高理论计算精度。

Research on simplified analysis method for web openings strength of hull structure based on vierendeel truss theory

In the design and construction of large cruise ship structures,cable duct layout and structural lightweighting requirements are taken into consideration,and many openings are often provided on the high webs of the main components.In order to effectively evaluate the strength characteristics of high-web structures with openings,the effects of longitudinal position,width and length of the waist circular opening on the peripheral strength are analyzed and the Vierendeel Truss theory is modified by using finite element numerical method.The results show that the proposed correction formula can be applied to different size structures and effectively improve the theoretical calculation accuracy.