Accurate prediction of corrosion rates is of great significance for ensuring the safe operation of CO2 transportation pipelines. In view of the current situation where there is a lack of a set of corrosion prediction models suitable for multi-impurities and different CO2 transportation phases, a corrosion prediction model based on a multi-strategy improved dung beetle optimizer (MIDBO) and support vector regression (SVR) was proposed. To solve problems such as the slow convergence speed and imbalanced global exploration and local exploitation capabilities of the DBO algorithm, a multi-strategy improvement scheme was introduced: at the initial stage of the algorithm, Tent chaotic mapping and opposition-based learning strategies were integrated to initialize the population, enhancing population diversity and convergence speed; during the dung beetle breeding phase, a dynamic spiral search strategy was employed to improve the global search capability; in the later stage of the algorithm, Lévy flight and greedy strategies were combined to perturb the population and update positions, strengthening the algorithm’s ability to escape out of local optima. Simulation results show that, compared to the DBO algorithm and single-strategy improved DBO algorithms, the MIDBO algorithm exhibited superior optimization performance across various test functions, validating the effectiveness of the multi-strategy improvements. The MIDBO-SVR corrosion prediction model was compared with DBO-SVR, GWO-SVR, SSA-SVR, and POA-SVR models in terms of prediction accuracy. The results show that the MIDBO-SVR algorithm achieved mean absolute error (MAE), mean squared error (MSE), and mean absolute percentage error (MAPE) values of 0.010 0, 0.000 2, and 13.21, respectively, all of which were lower than those of the other four models. The MIDBO-SVR corrosion prediction model established demonstrated high prediction accuracy and strong practical significance, offering considerable potential for field applications.
HUA Jing, JIANG Xiu, YU Chao, XIE Hui, FU Jian-bin, PANG Ming-yu.
Corrosion Prediction of CO2 Transport Pipeline Based on Multi-strategy Improved Dung Beetle Algorithm and Support Vector Regression[J].
Science Technology and Engineering, 2026, 26(3): 1028-1037 DOI:10.12404/j.issn.1671-1815.2500971
双碳背景下,碳捕集、利用与封存(carbon capture, utilization and storage,CCUS)是应对全球气候变化的关键技术。到2050年,仍有30%左右的碳排放无法通过减排消除,除去自然碳汇后,有(10~20)亿t的二氧化碳需要通过CCUS技术来处理。管道输送是将CO2从捕集地输送到利用地和封存地最经济、高效的方式之一[1-3],输送过程中,45%的管道失效源于腐蚀,因此腐蚀速率的准确预测对于保障CO2输送管道安全运行意义重大[4]。
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