交通载荷作用下埋地聚乙烯燃气管道的有限元分析  

Finite Element Analysis of Buried PE Gas Pipeline under Traffic Load

作　　者：李明阳[1] 陈国华[1] 

机构地区：[1]华南理工大学安全科学与工程研究所,广东广州510640

出　　处：《塑料工业》2009年第9期30-33,共4页China Plastics Industry

摘　　要：运用非线性有限元法,在ANSYS中建立埋地PE燃气管道的有限元模型,对交通载荷作用下的埋地PE管进行瞬态分析,得到管道应力及直径变形量随时间的变化关系,比较不同管顶覆土厚度下的管道力学性状。研究发现,建立的有限元模型,其计算结果能够较为真实地反映PE管的蠕变行为,聚乙烯的黏弹性降低了管道应力梯度,管顶覆土对交通载荷作用下埋地PE管道有减荷效果。交通载荷是引起管道形变的主要因素,适当增加管道埋深刻提高管道寿命。Using nonlinear finite element method （ FEM）, the FEM model of buried polyethylene （PE） gas pipeline was established with ANSYS. Traffic load and transient analysis of the buried gas PE pipe was applied. The changing relation of pipe stress and the deformation in pipe diameter along with time were obtained. With differences of pipeline laying depth, the mechanical behaviors of buried pipelines were compared. The result showed that the establishment of FEM model could provide the result which react the creep behavior of PE pipe faithfully. Viscoelasticity of PE pipe decreased pipe stress gradient, covering soil had effect on load reduction under the traffic load. Traffic load was the main reason of the pipe deformation. Appropriate increase in pipeline depth could increase pipe life.

关 键 词：聚乙烯 埋地燃气管道 有限元分析 ANSYS软件 交通载荷 

分 类 号：TU996.7[建筑科学—供热、供燃气、通风及空调工程]