油管抗内压强度及爆破失效机理研究  

Study on Collapse Strength and Failure Mechanism of the Tubing Under Internal Pressure

作　　者：单涵 王成 许雷明 高连新[1] SHAN Han;WANG Cheng;XU Lei-ming;GAO Lian-xin(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China;Jiangsu Changbao Precision Tube Co.,Ltd.,Jiangsu Changzhou 213200,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200237 [2]江苏常宝普莱森钢管有限公司,江苏常州213200

出　　处：《失效分析与预防》2023年第5期287-293,共7页Failure Analysis and Prevention

基　　金：中国石油科技创新基金项目(2019D-5007-0305)。

摘　　要：利用水压试验机对油管进行爆破试验,检测在爆破过程中油管外壁的应变变化。运用弹塑性力学理论建立模拟油管爆破过程的有限元模型,得到油管外壁应变随内压变化的曲线,并与试验值对比,从而探索油管爆破的失效机理。结果表明,油管爆破过程中,壁厚较薄处首先产生较大的应变进而造成油管在此处爆裂。利用有限元法进一步分析发现,与管体椭圆度相比,壁厚不均度对油管抗内压强度影响较为显著。将有限元模拟与应变测试结合起来以提高有限元模拟的精度,对研究油管爆破失效机理、预测油管抗内压强度具有一定的参考价值。The blasting test of the tubing is carried out by using the hydraulic testing machine,and the strain change of the outer wall of the oil pipe is detected during the blasting process.Using the theory of elastoplastic mechanics,a finite element model for simulating the blasting process of tubing was established,and the curve of the strain of the outer wall of the tubing changing with the internal pressure was obtained.Compared with the test value,the failure mechanism of tubing blasting was explored.During the blasting process of tubing,the thin part of the pipe wall first produces a large strain and causes the tubing to burst.Further analysis using the finite element method found that,compared with the ovality of the pipe body,the unevenness of the wall thickness has a more significant effect on the internal pressure resistance of the tubing.Combining the finite element simulation with the strain test to improve the accuracy of finite element simulation has certain reference value for studying the failure mechanism of tubing blasting and predicting the internal pressure resistance strength of tubing.

关 键 词：油管 抗内压强度 应变测试 有限元法 壁厚不均度 

分 类 号：TE931.2[石油与天然气工程—石油机械设备]