初始几何缺陷对埋地管道屈曲临界载荷影响研究  

Influence of initial geometric imperfection on critical load of buckling in buried pipeline

作　　者：康习锋[1,2] 张宏 罗茜 刘啸奔 

机构地区：[1]中国石油大学机械与储运学院,北京100022 [2]中国人民武装警察部队学院消防指挥系,河北廊坊065000

出　　处：《中国安全生产科学技术》2015年第10期23-27,共5页Journal of Safety Science and Technology

摘　　要：管道初始几何缺陷与屈曲临界载荷间的关系已经成为新的研究方向。利用有限元方法对管道初始几何缺陷与临界载荷的关系进行研究,建立管道模型,在特征值屈曲分析基础上,输入不同比例的几何缺陷,逐个分析管道模型中节点的横向位移情况。结果显示,当几何缺陷达到一定程度时,屈曲临界载荷明显降低,且与初始几何缺陷具有线性相关性,利用Matlab对结果作线性拟合,给出了修正后的屈曲临界载荷公式。The correlation between initial geometric imperfection and critical load of buckling has become a new research direction,which was investigated through finite element method in this paper. The model of pipeline was established. Based on the eigenvalue analysis of buckling,through inputting the geometric imperfection with different scale,the traverse displacements of nodes in the pipeline model were analyzed respectively. The results showed that when the geometric imperfection reaches a certain extent,the critical load of buckling decreases obviously and has a linear correlation with the initial geometric imperfection. The linear fitting was conducted on the results by Matlab,and the modified formula for critical load of buckling was presented.

关 键 词：埋地管道 屈曲 临界载荷 有限元 

分 类 号：X937[环境科学与工程—安全科学]