边界单元法计算冻土层管道阴极保护时的电位分布  

Defining the voltage distribution of pipeline in frozen earth under cathodic protection with boundary element method

作　　者：梁成浩[1] 袁传军[2] 黄乃宝[1] 

机构地区：[1]大连海事大学腐蚀控制和电化学工程研究所,辽宁大连116026 [2]大连民族学院生命科学学院,辽宁大连116600

出　　处：《大连海事大学学报》2011年第4期109-112,116,共5页Journal of Dalian Maritime University

基　　金：国家高技术研究发展计划(863)项目(2009AA05Z120)

摘　　要：为研究冻土层中阴极保护效果,通过冻土层热管阴极保护系统中电位分布分析、函数边界条件选择,建立冻土层腐蚀电场电位分布的数学模型.以边界单元为计算方法,应用Matlab开发工具,对阴、阳极的电流密度和电位的函数关系采取三阶段线性拟合处理,计算出冻土层中镁牺牲阳极-碳钢热管阴极保护系统中碳钢表面的电位分布.结果表明,电位计算值与实测值的误差小于10%,可为今后稳定冻土层路基和铺设管道阴极保护设计提供基础依据.To investigate the effect of sacrifice anode system in frozen earth,a mathematical model was established to analyze and calculate the potential distribution of heat pipe under cathodic protection in frozen earth under selected boundary condition by using boundary element as the computational method along with Matlab sofware.Results indicate that three stage linearity can be used to fit the relationship between potential and both the anodic and cathodic current density. The error between predicted potential value and the actual one is less than 10%,which can provide the basis for stabilizing the roadbed and designing the pipe＇s cathodic protection in frozen earth in the future.

关 键 词：冻土层 管道 阴极保护 电位分布 边界单元法(BEM) 

分 类 号：TG174.41[金属学及工艺—金属表面处理]