| 海底管线整体屈曲过程中塑性变形研究 |
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| 引用本文： | 闫澍旺,洪兆徽,闫玥,刘文彬.海底管线整体屈曲过程中塑性变形研究[J].海洋工程,2016,34(5):83-91. |
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| 作者姓名： | 闫澍旺 洪兆徽 闫玥 刘文彬 |
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| 作者单位： | 天津大学 水利工程仿真与安全国家重点实验室，天津 300072;天津大学 水利工程仿真与安全国家重点实验室，天津 300072;天津大学 水利工程仿真与安全国家重点实验室，天津 300072;中交天津港湾工程研究院有限公司，天津 300222 |
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| 摘 要： | 海底管线是海洋油气工程中主要的输送手段。在工作状态下,受高温高压的影响,深海管线可能会发生水平向整体屈曲。随海洋油气作业水深的增大,施加于管线的温度和压强也逐渐增加,导致管线产生较大的屈曲位移和截面应力,使得截面产生塑性应变。本文采用数值模拟方法,对海底管线整体屈曲过程中塑性区的分布及其与整体屈曲影响因素的关联性、塑性变形对水平向变形的影响和塑性变形造成的截面椭圆度的变化规律进行分析,研究塑性变形对整体屈曲过程影响的规律。
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| 关 键 词： | 海底管线 水平向整体屈曲 塑性变形 椭圆度 |
Research on the plastic deformation in the pipeline global buckling process |
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| YAN Shuwang,HONG Zhaohui,YAN Yue and LIU Wenbin.Research on the plastic deformation in the pipeline global buckling process[J].Ocean Engineering,2016,34(5):83-91. |
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| Authors: | YAN Shuwang HONG Zhaohui YAN Yue and LIU Wenbin |
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| Institution: | State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China;CCCC Tianjin Port Engineering Institute Co., Ltd., Tianjin 300222, China |
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| Abstract: | Submarine pipeline is widely used in offshore oil and gas development engineering. The deep water pipeline may have lateral global buckling due to the high temperature and pressure. With the increasing operating water depth, pipeline suffers higher temperature and pressure difference, leading to larger buckling displacement and plastic deformation. Tthe influence of plastic deformation on the pipeline global buckling process is studied using numerical simulation method. The distribution of plastic deformation region and the interaction between plastic strain and lateral global buckling influence factors are analyzed. The impact of plastic deformation on the lateral displacement and the ovality caused by the plastic deformation are calculated to reveal the influence of the plastic deformation on the lateral global buckling. |
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| Keywords: | submarine pipeline lateral global buckling plastic deformation ovality |
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