桁材开孔腹板的线性屈曲强度分析

船体在总纵弯曲时甲板纵桁和船底纵桁承受较大的轴向压力,而在桁材腹板上开孔会影响其腹板的屈曲强度.针对这一问题,应用有限元屈曲特征值分析方法对受轴向压力开孔腹板的屈曲载荷进行计算.通过对计算结果的分析,对开孔尺寸和开孔位置对腹板屈曲强度影响的规律进行了归纳,并对腰圆孔和圆孔对腹板屈曲的影响程度做出了比较,对船体结构中腹板开孔尺寸及位置提出了一些建议.

Elastic buckling strength analysis of girder webs with cutouts

The deck and bottom longitudinal girders in ship structures are often subjected to high axial loads.On those web plates the cutouts can change the buckling strength of the girders.By using finite element buckling eigenvalue analysis,the buckling loads of plates with holes under axial loads are studied.With analysis of the calculation results,some general rules about the effects that the hole size and the position can exert on buckling strength are concluded.The patterns of the influences of circular holes and rectangular holes with round corners on buckling strength of web plates are compared.Some recommendations on the size and position of web holes are suggested.