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海浪载荷作用下滩海集输管道稳定性影响分析
Analysis of stability of gathering lines in beach-sea under ocean wave load
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- DOI:
- 10.3969/j.issn.1001-2206.2025.05.008
- 作者:
- 赵颖, 周国强, 马艳荣, 刘昱洲, 曹德国, 佟云霞
ZHAO Ying, ZHOU Guoqiang, MA Yanrong, LIU Yuzhou, CAO Deguo, DONG Yunxia
- 作者单位:
- 1. 中石化胜利海上石油工程技术检验有限公司, 山东东营 257000;2. 胜利油田分公司东胜精攻石油开发集团股份有限公司, 山东东营 257000
1. Sinopec Shengli Offshore Petroleum Engineering and Technical Inspection Co., Ltd., Dongying 257000, China;2. Shengli Oilfield Company Dong Sheng Jinggong Petroleum Development Group Co., Ltd., Dongying 257000, China
- 关键词:
- 集输管道; 滩海环境; 海浪; 稳定性
gathering line;beach-sea environment;ocean wave;stability
- 摘要:
-
在长期波浪冲刷的作用下，滩海区域集输管道常出现局部裸露，致使海浪直接冲击管道本体，增大管道失稳风险。针对该问题，以胜利滩海海域为工程背景，构建集输管道-土体耦合三维有限元模型，分析海浪冲击对集输管道应力和形变响应的作用机理，并定量分析冲击速度、管道径厚比及管道内压等参数对结构力学行为的影响规律。主要结论如下：采用壳单元模拟管道、非线性弹簧单元表征土体特性的耦合模型，能够有效模拟滩海环境下管道的力学行为；在0.5~2.0 m/s海浪冲击速度工况下，集输管道裸露段的中部区域变形和受力最为显著；对于D76 mm×4 mm、D89 mm×8 mm、D114 mm×9 mm和D159 mm×8 mm这4种常用管道规格，管道径厚比越大，其等效应力和应变值均增大；当运行内压从1.6 MPa逐步增大到5.0 MPa时，集输管道的应力波动和形变显著加剧。研究成果可为滩海区域集输管道的安全评估和保护措施制订提供参考。
Under the long-term action of ocean wave scouring, partial exposure of gathering lines in the beach-sea area often occurs, causing the ocean waves to directly impact the pipeline body and thus increasing the risk of pipeline instability. To address this issue, the Shengli beach-sea area was taken as the engineering background, and a three-dimensional finite element model of the gathering line and soil coupling was established. The mechanism of the influence of ocean wave impact on the stress and deformation response of the gathering line was analyzed, and the influence laws of parameters such as impact velocity, pipeline diameter-to-thickness ratio, and internal pipeline pressure on the structural mechanical behavior were quantitatively analyzed. The main conclusions are as follows: The coupling model that uses shell elements to simulate the pipeline and nonlinear spring elements to characterize the soil properties can effectively simulate the mechanical behavior of the pipeline in the beach-sea environment. Under ocean wave impact velocity conditions ranging from 0.5 to 2.0 m/s, the deformation and stress in the middle area of the exposed section of the gathering line are the most significant; for four commonly used pipeline types, namely D76 mm × 4 mm, D89 mm × 8 mm, D114 mm × 9 mm, and D159 mm × 8 mm, a larger pipeline diameter-to-thickness ratio means greater equivalent stress and strain values. When the operating internal pressure gradually increases from 1.6 MPa to 5.0 MPa, the stress fluctuation and deformation of the gathering line are significantly intensified. The research results can provide valuable reference for the safety assessment and the formulation of protection measures for gathering lines in the beach-sea area.