用非线性有限元的方法研究准静态加筋方形管压溃破坏中加强筋的影响  

Effect of stiffeners on quasi-static crushing of stiffened square tube with nonlinear finite element method

作　　者：张爱年[1] 铃木克幸[1] 

机构地区：[1]东京大学新领域创成科学研究科

出　　处：《船舶力学》2005年第4期61-68,共8页Journal of Ship Mechanics

摘　　要：在船舶碰撞和搁浅中,薄壁结构在轴向压力条件下的压溃破坏是一种重要的破坏模式。本文用非线性有限元方法研究了准静态条件下纵向和横向加强筋对加筋方形管压溃破坏的影响。基于实验结果和数值仿真的结果,给出了新的等效板厚和平均压溃载荷计算公式。计算结果表明新的平均压溃载荷计算公式能够更好地拟合实验结果。During the ship collision and grounding, the crushing collapse of thin-walled structure subjected to compressive load is one of the important failure modes.The effects of longitudinal and transverse stiffeners on quasi-static crushing of stiffened square tubes are studied with the nonlinear finite element method. Based on the experimental and numerical simulation results,a new equivalent plate thickness formula and new empirical formulas for the mean crushing load are given, The prediction of the mean crushing load agrees well with the experimental data.

关 键 词：加筋方形管 等效板厚 平均压溃载荷 非线性有限元方法 

分 类 号：U661.4[交通运输工程—船舶及航道工程]