基于FA-BAS-ELM的海洋油气管道外腐蚀速率预测

Prediction of external corrosion rate of offshore oil and gas pipelines based on FA-BAS-ELM

为提高海洋油气管道外腐蚀速率预测的精度和效率,建立基于因子分析(FA)和天牛须搜索算法(BAS)的极限学习机(ELM)腐蚀速率预测模型。利用FA对影响因素数据集进行降维处理,确定预测模型的输入变量;建立ELM预测模型,并采用BAS对ELM模型的参数进行优化,避免参数取值随机性对模型预测性能的影响;以实海挂片试验为例,通过建模仿真评价模型的预测性能,并与其他模型进行对比分析。结果表明:FA-BAS-ELM预测模型的平均绝对误差(MAPE)仅为1.92%,决定系数R^(2)高达0.9949,相比于其他模型,该模型具有更优的预测性能。

In order to improve prediction accuracy and efficiency of external corrosion rate of submarine oil and gas pipelines,a ELM prediction model based on FA and BAS was established.FA method was used to reduce dimension of influencing factors'data set and determine input variables of ELM network.Then,an ELM prediction model was established,and its parameters were optimized by BAS to avoid influence of randomness of parameter values on its predictive performance.Finally,with the real sea hanging film experiment as an example,predictive performance of the model was evaluated through modeling and simulation,and it was compared with other models.The results show that the mean absolute percentage error(MAPE)of FA-BAS-ELM prediction model is only 1.92,and its determination coefficient R^(2) reaches as high as 0.9949,indicating that the model has better prediction accuracy and performance.