| 高压输气管道内裂纹相互作用的有限元数值分析 |
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| 引用本文： | 姚安林,胡益平,曾祥国,王稳,刘卫国,陈华燕.高压输气管道内裂纹相互作用的有限元数值分析[J].压力容器,2011,28(3):28-32. |
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| 作者姓名： | 姚安林 胡益平 曾祥国 王稳 刘卫国 陈华燕 |
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| 作者单位： | 1. 西南石油大学石油工程学院,四川,成都,610500
2. 四川大学建筑与环境学院,四川,成都,610065 |
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| 基金项目： | 西气东输管道工程项目，四川大学中央高校基本科研业务费专项项目 |
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| 摘 要： | 基于三维虚拟裂纹闭合技术（3D-VCCT）,利用大型有限元分析软件ANSYS对内表面含单条半椭圆裂纹的高压输气管道的应力强度因子进行计算,计算结果与已有结果具有相当好的一致性,并验证了该方法应用于薄壁管道计算的有效性。然后考虑了2条对称副裂纹的短半轴与长半轴的比值,主副裂纹的距离以及主副裂纹环向角度对主裂纹应力强度因子的影响,得到主裂纹应力强度因子的变化规律,并给出了主裂纹最深点和表面点应力强度因子的计算公式。提出的计算方法和结果对高压埋地输气管道的风险评估、设计和施工具有一定的参考价值。
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| 关 键 词： | 高压输气管道 多裂纹 三维虚拟裂纹闭合法 应力强度因子 |
Finite Element Numerical Analysis of Multiple Interacting Cracks in High Pressure Gas Pipeline |
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| YAO An-lin,HU Yi-ping,ZENG Xiang-guo,WANG Wen,LIU Wei-guo,CHEN Hua-yan.Finite Element Numerical Analysis of Multiple Interacting Cracks in High Pressure Gas Pipeline[J].Pressure Vessel Technology,2011,28(3):28-32. |
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| Authors: | YAO An-lin HU Yi-ping ZENG Xiang-guo WANG Wen LIU Wei-guo CHEN Hua-yan |
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| Affiliation: | YAO An-lin1,HU Yi-ping2,ZENG Xiang-guo2,WANG Wen2,LIU Wei-guo2,CHEN Hua-yan2 (1.School of Petroleum Engineering,Southwest Petroleum University,Chengdu 610500,China,2.College of Architecture and Environment,Sichuan University,Chengdu 610065,China) |
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| Abstract: | The stress intensity factor for high pressure gas pipeline with single surface crack of an elliptical front was evaluated by the method of three-dimensional virtual crack closure technique(3D-VCCT) and the finite element method(FEM).Quantitative comparisons were made between the calculated results and the existing results,which showed great agreement.Then,two symmetric minor cracks were placed in the structure,and the shape of the minor crack,and the length and angle between the minor and the main cracks we... |
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| Keywords: | high pressure gas pipeline multiple cracks 3D-VCCT stress intensity facto |
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