摘要：Long-distance hydrogen transmission based on natural gas pipelines is crucial for hydrogen energy industry. However, stress concentration caused by external loading and defects can result in great hidden risk for safe transportation. Consequently, it is necessary to evaluate the pipeline stress concentration under hydrogen environment. In this paper, we propose a quantitative stress evaluation method for hydrogen transmission pipelines based on incremental magnetic-stress coupling model. Firstly, hydrogen charging experiments for L245 pipeline steels are carried out with varying hydrogen charging times, and then the tensile fracture experiments are conducted. Then, metal magnetic memory (MMM) signals under the coupling of hydrogen-defect-stress are collected. Based on the traditional magnetic-stress coupling model, the quantitative relationship between MMM signals and pipeline stress is established. Finally, the correction factors concerning hydrogen and defects are introduced to modify the quantitative relationship, and the improved pigeon-inspired optimization (IPIO) is utilized to optimize the correction factors based on incremental learning mechanism. The results indicate that the proposed incremental magnetic-stress coupling model can achieve more accurate stress evaluation for different working conditions, compared to other optimization methods, the average relative error is 8.7 %. This study provides a theoretical basis for ensuring the safety and reliability of hydrogen transmission pipelines. ? 2025 Elsevier Ltd

ISSN号：0360-5442

卷、期、页：卷330

发表日期：2025-09-01

期刊分区（SCI为中科院分区）：一区

收录情况：SCI（科学引文索引印刷版）,机械工程领域高质量科技期刊分级目录（T1）,地学领域高质量科技期刊分级目录（国外T1）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Energy

通讯作者：苗兴园,孙祥龙

第一作者：赵弘

论文类型：期刊论文

论文概要：苗兴园,孙祥龙,赵弘，Quantitative stress evaluation of hydrogen transmission pipeline based on incremental magnetic-stress coupling model，Energy，2025，卷330

论文题目：Quantitative stress evaluation of hydrogen transmission pipeline based on incremental magnetic-stress coupling model