摘要
本文基于梁 -柱理论、理想弹塑性假设、平面假设和塑性铰理论建立了拉伸和压缩加筋板单元的标准应力 -应变关系曲线 ,开发了船体结构总纵极限强度的简化逐步破坏分析方法。应用该简化方法编制的计算程序较为详细地分析了五条船截面/箱型梁模型的总纵极限强度 ,结果表明本文开发的简化逐步破坏方法和计算程序是正确可靠的 。
A simplified procedure is developed for predicting the ultimate strength of hull girder based on the basic progressive collapse method. The normalized stress - strain relationship of structural element is introduced by applying beam - column theory, elastoplastic assumption, and plastic joint theory. The total bending moment is obtained by integrating the contribution of all elements, and the ultimate bending moment is defined by the moment corresponding to the point with zero or negative slope in the moment - curvature relationship. The complete procedure has been coded into a FORTRAN program and tested against four ship/box girder sections. The results obtained from the present program appear to be quite satisfactory. It shows the advantage of present method to predict the ultimate strength of hull girder in ship design.
出处
《船舶力学》
EI
2001年第5期21-35,共15页
Journal of Ship Mechanics
关键词
船体结构
极限强度
应力-应变关系
结构设计
结构应力
Beams and girders
Bending moments
FORTRAN (programming language)
Ship models
Strain
Stress analysis
