摘要
研究滩海天然气管道的变形规律和抗漂浮问题,可为该方面设计和计算提供参考依据,对保障管道安全运行有着重要意义。设计了滩海埋地天然气管道变形相似试验,模拟了在预定工况下滩海管道的变形过程,并采用有限元软件ANSYS计算了相同工况下的管道与土体的受力变形结果,与试验结果进行了对比,从而提出了一套关于滩海管道抗漂浮计算的有限元计算方法。采用ANSYS对实际工程管道的抗漂浮计算结果表明:在管道模型两端约束区,局部应力集中现象比较严重;远离约束区的管道各截面变形趋于一致,属于平面应变问题;随着管道埋深的减小,受浮力作用段管道的Y向位移加速增大。(图13,表3,参12)
Investigation on deformation and anti-floating properties of offshore buried pipeline can provide a reference to the design and calculation thereof that is significant to ensure the safe operation of the pipeline. A similarity test is conducted for deformation of an offshore buried pipeline under predetermined operating conditions. Besides, the finite element software ANSYS is used to calculate the forced deformations of pipe and soil. After comparing the calculation result with the test result, a finite element method about anti-floating calculation of offshore pipeline is proposed. The ANSYS calculation of anti-floating of an actual pipeline shows that local stress is highly concentrated in constraint areas at both ends of the pipe model. Moreover, the section deformation of pipeline that is away from the constraint area tends to be consistent, which attributes to plane strain. With the decrease of the depth of the buried pipeline, Y-axial displacement of the pipeline section that is imposed on buoyancy accelerates. （13 Figures, 3 Tables, 12 References）
出处
《油气储运》
CAS
2014年第8期900-904,共5页
Oil & Gas Storage and Transportation
关键词
滩海管道
相似试验
有限元分析
平面应变
offshore pipeline, similarity test, finite element analysis, plane strain
