摘要
通过对拱顶储罐罐壁承受轴向载荷、初始几何缺陷及轴压失稳状况研究,指出在固定顶罐设计、建造和运行各阶段都应进行罐壁轴压稳定性校核.根据圆柱薄壳稳定性理论和轴压失稳临界应力数值分析计算结果,提出固定顶罐罐壁轴压稳定性校核方法和数学模型,并运用回归分析方法建立罐壁轴压失稳临界应力计算公式.对几种常用规格的拱顶罐有初始挠度缺陷罐壁轴压稳定性分析表明:随储罐容积和罐壁初始挠度增大,罐壁轴压稳定性呈减弱趋势.
The study on the dome-roof tank shells with imperfections under the axial compressive and buckling loads shows that the buckling strength of fixed-roof tank shells should be checked during its design and construction stages as well as during the service stage. Based on the stability theory and the numerical analysis of critical buckling strength for cylindrical shell subjected to axially compressive loads, a checking computation method and its mathematical model are established, and then the formula for calculating the buckling loads are obtained by regression analysis. The stability of tanks of several typical sizes with initial geometric imperfections is also studied, and the buckling strength of the tank shells under axial compression is decreased with their volume and shell＇s increasing initial deflection.
出处
《力学与实践》
CSCD
北大核心
2008年第5期53-56,共4页
Mechanics in Engineering
关键词
拱顶罐
含缺陷薄壳
轴向载荷
薄壳稳定性
失稳临界应力
dome-roof tank, shells with imperfections, axially compressive load, shell stability, buckling critical stress
