基于有限元法对爆破试验预测埋地管道极限载荷的准确性分析  

A finite-element-based analysis of the accuracy in bursting tests predicting the ultimate load of a buried pipeline

作　　者：马彬[1] 帅健[1] 刘德绪 李枢一[3] 

机构地区：[1]中国石油大学(北京)机械与储运工程学院 [2]中原勘察设计研究院 [3]中国石化天然气榆济管道分公司

出　　处：《天然气工业》2013年第6期108-112,共5页Natural Gas Industry

基　　金：国家科技重大专项"大型油气田及煤层气开发"(编号:2011ZX05017-004)

摘　　要：依据工程中常采用的两种预测管道极限载荷的全尺寸爆破试验(按照密封方式的不同分为管道两端加封头和管道两端密封处理)与实际埋地管道的工作条件不相符的问题,对爆破试验预测结果的准确性提出了质疑。为此,采用有限元方法对爆破试验预测结果的准确性进行验证。首先收集了X80、X100高强度钢腐蚀管道的爆破试验数据,通过试验数据与有限元计算结果对比的方法确定出适用于高强度钢管道的失效判据;基于该失效判据,计算出管道在两种爆破试验和埋地等3种工况下的极限载荷,并进行了对比分析。结果表明:采用两种爆破试验预测高强度埋地管道极限载荷的误差均低于5%,其中采用加封头的爆破试验预测埋地管道极限载荷的误差为2.06%,建议采用。该研究结果为预测埋地管道的极限载荷提供了理论依据,对于实际工程应用以及管道选材具有重要价值。The vessel test and hydraulic ring expansion test are two full-scale bursting testing methods of predicting the ultimate load of a buried pipeline. However, the prediction accuracy of the above two tests is in question because the testing conditions do not match the practical working conditions in the buried pipelines. In view of this, this paper adopts the finite element （FE） method to simulate the pipeline in three working conditions： vest test, hydraulic ring expansion test, and the actual buried condition. First, the test data of XS0 and X100 were collected and the failure criteria of high-strength steel pipes were thus determined by comparing the collected test data and the calculated results from the FE analysis. On this basis, the ultimate loads of pipelines in the above three working conditions were obtained as well as their comparative analysis. It was found that the errors in the former two tests were both less than 5%, the error of the vessel test was only 2.06%, so the vessel test is recommended to use. This study provides the theo retical basis for the prediction of the ultimate load of buried pipelines and is of great value to the practical application and tubular goods selection.

关 键 词：高强度钢 管道 全尺寸爆破试验 极限载荷 有限元 失效判据 误差 

分 类 号：U171[交通运输工程]