油气管道的锚固法兰结构设计与有限元分析

锚固法兰按照常规计算方法得到的各部位尺寸较为保守,重要部位的结构尺寸往往不合理,局部应力过大,缺少必要的分析优化过程.以某规格高压、大口径锚固法兰为例,采用理论计算与有限元分析方法相结合进行设计计算.结果表明:在法兰的圆角处和管颈处有最大的应力强度分布,其余位置的各应力分量均较小,强度校核满足要求,结构设计合理.因此,锚固法兰设计计算结合有限元分析方法,可确保设计质量,满足不同工程项目锚固的技术要求.

Structural design and finite element analysis of anchoring flange for oil and gas pipelines

For the anchoring flange,the size of each part calculated by the conventional calculation method is more conservative,structural size of important parts is often unreasonable,local stress is too large and necessary analysis and optimization are quite insufficient.Take one high-pressure and heavy diameter anchoring flange as an example,the theoretical calculation and finite element analysis method are integrated for analysis and calculation.Results show that the maximum stress intensity is distributed at the flange fillet and pipe neck,stress components in the other positions are smaller,strength check meets the requirements and structural design is reasonable.Therefore,the anchoring flange design calculations combined with the finite element analysis can ensure design quality,to meet the anchoring requirements of different projects.