|本期目录/Table of Contents|

[1]杨帆,李雷雷,姜文全,等.埋地热油管道泄漏裂纹开裂的应力研究[J].中国安全生产科学技术,2015,11(6):63-67.[doi:10.11731/j.issn.1673-193x.2015.06.010]
　YANG Fan,LI Lei-lei,JIANG Wen-quan,et al.Study on stress of crack initiation in leakage of buried hot oil pipeline[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2015,11(6):63-67.[doi:10.11731/j.issn.1673-193x.2015.06.010]
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埋地热油管道泄漏裂纹开裂的应力研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
11
期数:
2015年6期
页码:
63-67
栏目:
学术论著
出版日期:
2015-06-30

文章信息/Info

Title:
Study on stress of crack initiation in leakage of buried hot oil pipeline
作者:
杨帆1; 李雷雷1; 姜文全2; 3; 任建民2; 唐华4
（1.辽宁石油化工大学石油天然气工程学院，辽宁 抚顺113001； 2. 辽宁石油化工大学 机械工程学院，辽宁 抚顺113001； 3.东北大学 机械工程及自动化学院，辽宁 沈阳110819； 4.四川恒日天然气工程有限公司，四川 成都610041 ）
Author(s):
YANG Fan1;  LI Lei-lei1;  JIANG Wen-quan2; 3;  REN Jian-min2;  TANG hua4
（1. College of Petroleum Engineering, Liaoning Shihua University, Liaoning Fushun, 113001, China; 2.School of Mechanical Engineering, Liaoning Shihua University, Fushun Liaoning 113001, China; 3. School of Mechanical Engineering and Automation ,Northeastern University, Shenyang Liaoning 110819, China; 4. Sichuan Hengri Natural Gas Engineering Co.,Ltd., Chengdu Sichuan 610041, China）
关键词:
埋地管线; 弯头; 应力; 有限元; 裂纹萌生
Keywords:
buried pipeline;  elbow;  stress;  finite element;  crack initiation
分类号:
X937; TE88
DOI:
10.11731/j.issn.1673-193x.2015.06.010
文献标志码:
A
摘要:
研究了导致埋地热油管道泄漏裂纹开裂的应力机制，采用有限元方法对埋地热油管道进行模拟计算，求得热-结构耦合作用下管道整体当量应力变化云图，并得出管道弯管处应力高于直管段应力的结论；继而采用电阻应变测试法对埋地热油管道的弯管处进行实时应力测定，并绘制了各测点的轴向和周向应力变化曲线，通过各测点应力比较得出弯管内侧有两点应力波动幅值偏大，弯管外侧4号测点处轴向应力超过管材的屈服点。结果表明：在结构-热应力耦合作用下，埋地热油管道在弯管外侧轴向应力最大，易有I型裂纹萌生并扩展，在弯管内侧易有疲劳裂纹萌生并扩展。
Abstract:
The stress mechanism of crack initiation in leakage of buried hot oil pipeline was discussed. The e buried hot oil pipeline was simulated by using finite element method. Equivalent stress variation nephogram was obtained under the coupling of thermal stress and structure stress, and it showed that the stress in elbow is higher than that of straight section. Then the real-time stress in elbow was measured for buried hot oil pipeline by using resistance strain test method, and the variation curves of axial and the circumferential stress on each measuring points were drawn. Through the comparison of stress in each measuring point, the amplitude of stress fluctuation was higher in two points on the inside of elbow, and the axial stress of No. 4 measuring point on the outside of elbow was above the yield point of pipeline material. The results showed that: under the coupling of structure-thermal stress, the ax-ial stress on the outside of elbow for buried hot oil pipeline was the maximum, and there could be initiation and propagation of type I crack, while the initiation and propagation of fatigue crack are easy to happen on the inside of elbow.

参考文献/References:

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备注/Memo

备注/Memo:
中央高校基本科研业务费专项（N130403012）
更新日期/Last Update: 2015-06-30