基于分布浮力式的海底管道侧向屈曲控制优化

Optimal Design for Lateral Buckling Control by Distributed Buoyancy Sections of Subsea Pipeline

不加控制的侧向屈曲严重威胁深海油气输送管道的安全运行.分布浮力式海底管道侧向屈曲控制技术中,各个分布浮力模块对管道系统有效轴向载荷有较强的耦合作用,必须进行合理设计.为提高对管道系统侧向屈曲的控制效果,基于弹性解析模型,对大尺度海底管道系统侧向屈曲分布浮力式控制技术中浮力模块的设计参数以及布置方案进行了优化设计.算例结果表明,优化设计方案通过合理设计分布浮力模块参数以及布置方案,减少了管道系统侧向屈曲长度,降低了整体的有效轴向载荷,使侧向屈曲位移得到了较好的控制,为优化设计方法在海底管道工程中的应用提供了参考.

Uncontrolled lateral buckling will seriously threat the safety and operation of oil and gas transmission pipeline.In lateral buckling control by distributed buoyancy sections of pipelines,various distributed buoyancy sections have coupling effects on effective axial load and should be designed reasonably.In order to improve the lateral buckling control effects of large-scale pipeline system,the design parameters and arrangement scheme of the distributed buoyancy sections were optimized based on the analytical model.The results show that the optimized design can reduce both the length of lateral buckling and the effective axial load of the pipeline by designing the parameters and the locations of the distributed buoyancy sections reasonably,by which the lateral displacement can be controlled well.The research provides a guideline for the application of the optimal design to subsea pipeline engineering.