摘要
以埋地钢质燃气管道为研究对象组成方案集,选取土壤电阻率、管道周围环境pH值、管地电位、硫酸盐还原菌含量、管道运行压力、管道埋深、服役时间为影响管道腐蚀的参数组成参数集,建立灰靶模型效果样本决策矩阵,利用“奖优罚劣”算子对其进行初始化处理,得到决策矩阵。采用熵值法计算管道腐蚀参数权重,不涉及决策者的主观判断,计算结果准确客观。由决策矩阵得到灰靶模型的正负靶心,计算各个管道参数集的综合靶心距,利用综合靶心距对不同管道的腐蚀风险进行比较,对比结果与现场测试结果相吻合,表明基于熵值法确定权重的多参数灰靶决策模型可以应用于多参数影响下的管道腐蚀风险对比。
The buried steel gas pipeline is taken as the research object to form a scheme set.The soil resistivity,pH value of the pipeline ambient environment,pipe-to-ground potential,content of sulfate reducing bacteria,pipeline operating pressure,buried depth of pipeline and service time are selected as the parameters affecting the pipeline corrosion to compose the parameter set.The grey target model effect sample decision matrix is established,and the decision matrix is obtained by initializing with the operator of"rewarding the good and punishing the bad".The entropy method is used to calculate the weight of the pipeline corrosion parameters,which does not involve the subjective judgment of the decision maker.The calculation results are accurate and objective.The positive and negative target centers of the gray target model are obtained from the decision matrix,and the comprehensive target center distance of each pipeline parameter set is calculated.The corrosion risks of different gas pipelines are compared by the comprehensive target center distance.The comparison results are consistent with the field test results,indicating that the multi-parameter gray target decision model based on the entropy method to determine the weight can be applied to the comparison of pipeline corrosion risks under the influence of multi-parameters.
作者
张雪娇
马旭卿
郭保玲
张玉星
ZHANG Xuejiao;MA Xuqing;GUO Baoling;ZHANG Yuxing
出处
《煤气与热力》
2020年第6期J0012-J0016,J0045,共6页
Gas & Heat
关键词
燃气管道
腐蚀风险
“奖优罚劣”算子
熵值法
灰靶决策模型
gas pipeline
corrosion risk
operator of"rewarding the good and punishing the bad"
entropy method
grey target decision model
