油气管道上凹痕应变计算方法
Calculation method for dent strain in oil and gas pipeline
-
摘要: 针对管道上的凹痕缺陷,深度准则已不能满足油气工业的需要,因此提出了基于应变的凹痕评价体系. 在经典的板壳理论中,弯曲应变能够通过凹痕深度值计算得到,但膜应变无法直接计算得到. 为获得所需的膜应变值,分别采用弧长法、多项式、能量法以及根据弯曲应变计算膜应变的方法来模拟和计算凹痕管道的真实膜应变,并与有限元结果进行对比. 通过分析和比较可知,根据弯曲应变计算得到的膜应变更加贴近真实值,对于运用应变准则评价凹痕管道完整性具有很重要的意义.Abstract: Since the depth criterion cannot meet the demands of oil and gas industry for detecting dent defects in pipeline, a dent evaluation system based on strain was proposed in this paper. In classical shell theory, bending strain can be calculated by the values of dent depth, but the membrane strain can not be calculated by the geometric relationship between displacement and strain. In order to obtain the desired membrane strain values, arc-length method, polynomial, energy method and calculation method of membrane strain according to the bending strain were used respectively to simulate and calculate the actual membrane strain values, and compared with results from finite element calculation. It was found from the analysis and comparison that the calculated membrane strain according to bending strain was closer to actual membrane strain values, which is instructive for the use of strain criterion in evaluating integrity of dented pipeline.
-
Keywords:
- dent /
- oil and gas pipeline /
- bending strain /
- membrane strain /
- finite element
-
-
[1] Hossein Ghaednia, Sreekanta Das, Rick Wang. et al. Safe burst strength of pipeline with dent-crack defect:Effect of crack depthand operating pressure[J]. Engineering Failure Analysis, 2015, 55: 288-299. [2] Ying Wu, Na Tang, Peng Zhang. The comparison of dented pipeline displacement calculation methsds[J]. Engineering Failure Analysis, 2015, 57: 562-573. [3] 焦中良, 帅 健. 含凹陷管道的完整性评价[J]. 西南石油大学学报, 2011, 33(4): 157-164. Jiao Zhongliang, Shuai Jian. Dented pipeline integrity assessment[J]. Journal of Southwest Petroleum Universit, 2011, 33(4): 157-164. [4] Daniel C. Brooke. Denting of pressurized pipelines under localised radial loading[J].International Journal of Mechanical Sciences, 2004, 46: 1783-1805. [5] 徐尊平, 程南璞, 雷斌隆, 等. 压力钢管表面凹坑缺陷的安全评定[J]. 焊接学报, 2007, 28(8): 62-64. Xu Zunping, Cheng Nanpu, Lei Binlong. et al. Safety assessment of surface pit in penstock[J]. Transactions of the China Welding Institution, 2007, 28(8): 62-64. [6] Allouti M, Schmitt C, Pluvinage G. et al. Study of the influence of dent depth on the critical pressure of pipeline[J]. Engineering Failure Analysis, 2012, 21: 40-51. [7] 张 鹏, 黄 超, 党思宏. 基于四阶B-样条最小二乘法的油气管道凹痕缺陷应变计算方法[J]. 中国安全生产科学技术, 2015, 11(1): 53-57. Zhang Peng, Huang Chao, Dang Sihong. Calculation methods of strain for dent defect on oil and gas pipelines based on fourth-order B-spline least square method[J]. Journal of Safety Science and Technology, 2015, 11(1): 53-57. [8] 董俊慧, 林 燕. 数值计算模拟工艺参数对管道环焊缝残余应力的影响[J]. 焊接学报, 2008, 29(3): 121-124. DongJunhui, Lin Yan. Effect of simulated welding parameters on pipe girth weld residualstresses[J]. Transactions of the China Welding Institution, 2008, 29(3): 121-124. [9] 伍 颖, 张 鹏, 谢彦平. 基于有限元法的平滑凹痕管道应力分析[J]. 焊接学报, 2013, 34(1): 57-60. Wu Ying, Zhang Peng, Xie Yanping. Stress analysis of plain dent on pipeline based on element method[J]. Transactions of the China Welding Institution, 2013, 34(1): 57-60. [10] Zhijian L. Estimation of strains in the dent of a pipeline[D]. Calgary of Calgary, Alberta, 2005. -
期刊类型引用(6)
1. 张金龙，魏晨亮，王丹丹，赵可天，李清超. 基于有限元的海底管道凹陷评价. 化工管理. 2024(03): 127-130 . 
百度学术
2. 伍颖，吴鹏，张媛，鄢小兵. 内压作用下含凹痕管道三维应变计算新方法. 天然气工业. 2022(09): 122-134 . 百度学术
3. 李康帅，郑召典，邵永波，彭宁. 含凹陷管道弯曲承载力研究. 压力容器. 2021(07): 17-25 . 百度学术
4. 彭宁，邵永波，杨冬平. 轴压下含凹痕海底管道残余承载力分析. 塑性工程学报. 2019(06): 312-320 . 百度学术
5. 马欣，李杰，薛涛，赖科. 含内腐蚀凹陷的压力管道应力应变研究. 塑性工程学报. 2018(03): 267-273 . 百度学术
6. 郭杰，王志月，郭磊，焦中良，单辉. 金属管材凹痕缺陷的应变计算研究. 石油规划设计. 2018(04): 28-32+58 . 百度学术
其他类型引用(7)
计量
- 文章访问数: 340
- HTML全文浏览量: 3
- PDF下载量: 195
- 被引次数: 13
下载:
