水环境中管道结构对阴极保护系统电位分布影响的数值模拟

Numerical Simulation of the Impact of Pipeline Structure on the Potential Distribution of Cathodic Protection System

在实际水下铺设工程中,由于需要避开一些水下构筑物,管道不可避免地存在转弯或是分输的情况,传统的检测方法较难实现对水体中阴极保护效果的分析评估。利用有限元软件COMSOL,对水环境中弯管及分支管线对管道整体阴极保护系统的影响进行了数值模拟和分析论述,分别研究了不同角度弯管、管道以相同的角度分别转向和转离阳极等情况下阴极保护电位的分布情况,获取了管道不同结构对阴极保护系统的影响规律,为管线阴极保护系统的设计优化提供理论参考。

In the design and calculation of the under-water cathodic protection system,pipelines inevitably need to sub-transmission or turn a certain angle in the actual pipeline laying project due to the need of avoiding some under-water structures.It’s difficult to analyze and evaluate the consequence of under-water cathodic protection system by using the traditional detection methods.By using finite element software COMSOL,it is respectively studied the potential distribution of different angle elbows when pipelines are turned to and turned away from the anode with the same angle.The influence rules of different pipeline structure on the cathodic protection system are obtained,which provides theoretical references for a reasonable design of the cathodic protection system.