埋地输油管道“Ω”形自然补偿器的热力耦合分析  

Thermal Coupling Analysis of “Ω” Nature Compensator for Buried Pipelines

作　　者：李勐[1] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院,北京昌平102249

出　　处：《当代化工》2015年第7期1538-1540,共3页Contemporary Chemical Industry

摘　　要：埋地输油管道在温度等荷载的作用下会产生较大的应力,作为管道必不可少的组成部分,自然补偿器有着分散管道过大应力的作用。基于非线性有限元方法,建立了"Ω"形自然补偿器的模型,用壳单元模拟管道,用非线性土弹簧模拟了管土相互作用。参考实际工程数据,分析了弯头回转角度对管道最大应力的影响,并讨论了不同温差与内压下自然补偿器对管道应力的降低作用。分析得到,使用90°的"Ω"形补偿器较为合理,内压较小时,补偿器能够更好的降低管道的应力水平。研究结果可为长输管道结构设计提供一定的参考。The stress of the buried oil pipeline will increase under temperature load. As an indispensable part of the pipeline, the nature compensator has the function of dispersing the tress of pipeline. Based on the nonlinear finite element method, using the shell element to simulate the pipe, employing nonlinear soil springs to simulate the constraint effect of soil on the pipeline, the model of ＂Ω＂ form natural compensator was established. Referring to the actual engineering data, influence of pipeline internal pressure, temperature and the turning angle of the elbow on the maximal stress and the safety coefficient was analyzed. The results show that 90°turning angle of the elbow is relatively reasonable, can effectively release the excessive stress.

关 键 词：“Ω”形 自然补偿器 回转角度 有限元模型 

分 类 号：TE832[石油与天然气工程—油气储运工程]