阴极保护数值计算中土壤电阻率的选取

发布时间：2018-06-15 18:20

本文选题：土壤电阻率 + 储罐底板　；参考：《材料保护》2015年10期

【摘要】：为了确定土壤电阻率分布方式对储罐底板阴极保护电位分布的影响,建立了储罐底板外侧阴极保护电位分布的数学模型,利用COMSOL软件计算在不同土壤电阻率分布方式下储罐底板外侧阴极保护电位的分布,研究了不同直径储罐在土壤电阻率分别为恒定、分层均匀、连续分布3种方式下阴极保护电位分布的计算误差。结果表明:采用土壤电阻率分层均匀分布方式下的计算误差最大为1.89%,恒定均匀分布方式下的计算误差最大为5.82%;储罐直径越大,数值计算的误差越小;通过COMSOL软件建立二次电流分布模型,其模拟计算结果与实际测试结果吻合良好,可以为阴极保护数值模拟中土壤电阻率的选取提供理论依据。
[Abstract]:In order to determine the effect of soil resistivity distribution mode on cathodic protection potential distribution of tank bottom plate, a mathematical model of cathodic protection potential distribution outside bottom plate of storage tank was established. The distribution of cathodic protection potential outside the bottom plate of the tank was calculated by using COMSOL software under different soil resistivity distribution patterns. The results showed that the soil resistivity of different diameter tanks was constant and stratified uniformly. Calculation error of cathodic protection potential distribution in three modes of continuous distribution. The results show that the maximum calculation error is 1.89 for the uniform distribution of soil resistivity and 5.82 for the constant uniform distribution, the larger the diameter of the storage tank is, the smaller the error of numerical calculation is. The secondary current distribution model is established by COMSOL software. The simulation results are in good agreement with the actual test results, which can provide a theoretical basis for the selection of soil resistivity in the numerical simulation of cathodic protection.
【作者单位】：西南石油大学石油与天然气工程学院;济宁矿业集团霄云煤矿;
【基金】：国家自然科学基金(51174172)资助
【分类号】：TG174.41

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