甲板初始变形对搁置脚载荷非线性接触的影响

Influence of initial deformation of deck on non-linear contact of undercarriage load

运输装置底部的搁置脚与船舶甲板之间有着复杂的非线性接触关系,为了研究甲板初始变形对接触的影响,以某运输装置的搁置脚为例,在Abaqus软件中建立甲板和搁置脚的非线性接触模型,并对其进行有限元数值计算,分析甲板板上Mises应力与接触压力的分布特征,同时进一步考虑不同形式的甲板初始变形工况。结果表明,不同初始变形的施加使甲板板应力与接触压力分布更为复杂,最大应力增大明显,这种影响主要是由甲板板的局部拱起导致的。板的初始变形影响最大,加强筋的梁柱型初始变形影响次之,加强筋的侧倾初始变形影响很小。因此,初始变形对搁置脚甲板接触的影响不能忽略。

There is a complicated non-linear contact relationship between the undercarriage,which is at the bottom of the transportation device,and the ship deck.In order to study the influence of the initial deflection of the deck on the contact,this paper takes the undercarriage of a transportation device as an example.The simulation model of the deck and the undercarriage has been established by Abaqus software and numerical results has been obtained.Through analysis of the Mises stress and contact pressure distribution characteristics on the deck plate,the influence of the different forms of initial deflection was discussed.The result shows that different initial deflection forms resulted in a more complicated distribution of deck plate stress and contact pressure,while the maximum stress increases significantly as well.This is mainly caused by the partial arching of the deck plate.The initial deflection of the plate has the greatest influence,followed by the initial deformation of the beam-column type of the stiffener,and the initial deformation of the tripping of the stiffener has little influence.Thus,the influence of initial deflection on the contact between the undercarriage and deck cannot be ignored.