摘要
黄土高原区域可能发生水土流失等情况,从而形成管道悬空,严重影响致密气管道的输送安全。为了提升埋地管道悬空段的安全性,采用ABAQUS,建立了悬空管道三维数值计算模型,综合考虑了重力和内压载荷共同作用下的不同悬空长度、内压、壁厚的管道最大应力与轴向应变变化情况。结果表明,应力的失效准则相对应变失效准则更加保守,基于应力的失效评价准则得出了不同悬空距离下管道安全等级的划分标准,因此增大壁厚或减小内压可在一定程度上提升悬空管道的安全性。
Soil and water loss may occur in the Loess Plateau region,resulting in suspended pipeline,which seriously affects the transportation safety of tight gas pipelines.In order to study the safety of buried pipelines in the suspended section,the study adopts ABAQUS to establish a three-dimensional numerical calculation model of suspended pipeline.Under the combined action of gravity and internal pressure load,the maximum stress and axial strain of the pipeline under different suspended length,internal pressure and wall thickness are considered comprehensively.The results show that the failure criterion of stress is more conservative than that of strain.Based on the failure evaluation criterion of stress,the safety classification standard of pipeline under different suspension distance is obtained.Increasing wall thickness or decreasing internal pressure can improve the safety of suspended pipeline to some extent.
作者
韦树封
刘金海
高振邦
林建伟
邱旭
Wei Shufeng;Liu Jinhai;Gao Zhenbang;Lin Jianwei(Oil Production Service Branch of CNOOC Energy Development Co.,LTD.,Tianjin,300452,China)
出处
《黑龙江科学》
2023年第6期82-84,共3页
Heilongjiang Science
关键词
悬空
管道
失效准则
应力应变
Suspension
Pipeline
Failure criteria
Stress and strain
