Elastic buckling of cylindrical pipe linings with variable thickness encased in rigid host pipes
Elastic buckling of cylindrical pipe linings with variable thickness encased in rigid host pipes
复制标题
刚性主管中不同厚度圆柱形管道内衬的弹性屈曲
DOI：
10.1016/j.tws.2011.11.003
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发表时间：
2012-02-01
影响因子：
6.4
通讯作者：
Shu, Heng
中科院分区：
文献类型：
--
作者：
Li, Zhaochao;Wang, Lizhong;Shu, Heng
现浇塑料管道衬里广泛应用于老化硬质管道的修复。在前面的分析中，为了简化起见，通常假定管道衬里的厚度为常数。然而，由于使用中的腐蚀性液体或气体，管道衬里的厚度可能是可变的。本文给出了变厚度圆管衬里在静水压力作用下弹性屈曲的解析解。除了基于最小势能理论的解析解外，还进行了有限元数值分析以供比较。有限元计算结果与解析解吻合较好。对有限元结果和解析解进行了讨论，并与其他作者提出的模型进行了比较。当管道衬里厚度不变时，我们的解析解可以简化为Clock的典型解。皇冠版权所有(C)2011由爱思唯尔有限公司出版。保留所有权利。
Cured-in-place plastic pipe linings are widely used in the rehabilitation of deteriorated rigid pipelines. Generally, the thickness of the pipe lining is assumed to be constant for simplification during the previous analysis. However, the thickness of the pipe lining may be a variable due to corrosive liquids or gases in service. This paper develops an analytical solution for the elastic buckling of cylindrical pipe linings with variable thickness subjected to external hydrostatic pressure. In addition to the analytical solution based on the minimum potential energy theory, a numerical analysis using the finite element method (FEM) is also performed for comparison. The FEM results agree well with the analytical solutions. Both the FEM results and the analytical solutions are discussed and compared with the models presented by other authors. When the thickness of pipe lining is constant, our analytical solutions can be simplified to Clock's typical solutions. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.