埋藏式压力钢管抗外压稳定性分析  

Stability Analysis of Embedded Pipe Under External Pressure

作　　者：梁月英[1] 王建[1] 郑东健[1] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098

出　　处：《水电能源科学》2005年第6期33-35,共3页Water Resources and Power

基　　金：国家自然科学基金重点项目(50139030);教育部"跨世纪优秀人才培养计划"基金(2003512643)

摘　　要：在屈曲和稳定性理论的基础上,用线性和非线性有限元法分析均匀外压下埋管的前屈曲和后屈曲临界失稳荷载,并以工程实例研究结构对初始缝隙、几何缺陷的敏感性以及围岩约束作用下钢管的抗外压稳定能力,并与阿姆斯图兹公式进行了分析比较,得到了更接近实际的稳定性计算结果。On basis of buckling and stability theory,the lowest critical pre-buckling and post-buckling load of embedded pipe under external pressure are studied by linear and nonlinear FEM.The sensibilityto initial gap and geometrical imperfection,and the stability under adjacent constraint are analyzed with a practical project.Answers are compared to ones computed by Amstutz formula,and some meaningful conclusions are drawn.

关 键 词：压力钢管 稳定性 前屈曲 后屈曲 临界失稳荷载 

分 类 号：TV732[水利工程—水利水电工程]