采用有限元分析评价螺旋焊管海上管线应用的可能性

摘要

For purpose of qualifying spiral welded pipe for offshore shallow water applications, the finite element (FE) study was performed to investigate the response of spiral welded pipe to different loading combinations and particularly to S-lay conditions. An emphasis is placed on how spiral welded pipe compares to other types of pipe more commonly used in the industry. Detailed analysis and discussion are presented on limit states highlighted in DNVs standard for submarine pipelines, such as burst,collapse, axial Tension, local buckling and combined loading. The analyses comprised nonlinear 3D FE simulations of spiral welded pipe, and taking into account relevant tolerances that were likely to affect its limit states and response to loading and installation conditions. The results indicated no major concerns regarding the use of spiral welded pipe in shallow water.%为了使螺旋焊管能够应用于浅海领域，采用有限元分析法研究了螺旋焊管在不同载荷组合，尤其是S形敷设条件下的响应。重点讨论了螺旋焊管与该行业常用的其他类型钢管的对比。详细分析和讨论了DNV标准中海底管道强调的极限状态，如破裂、压溃、轴向拉伸、局部屈曲和复合载荷。分析包含了螺旋焊管的非线性三维有限元模拟，并考虑到了可能会影响其极限状态的相关公差以及对载荷和安装条件的响应。研究结果表明，在浅水区使用螺旋焊管没有太大的问题。