CAJ | 학술논문

为了科学地指导DN150承插管线的使用与管理，采用非线性有限元法对带内腐蚀缺陷的DN150承插管线进行了剩余强度的评估。通过分析和计算，研究了腐蚀缺陷宽度、长度和深度对管线极限承载能力的影响。结果表明：腐蚀缺陷宽度对DN150承插管线的承载能力影响很小，可忽略不计；随着腐蚀缺陷长度的增加，管线的承载能力略微减小，当缺陷长度达到150 mm，管道失效压力基本不变；随着腐蚀缺陷深度的增加，管道失效压力呈线性递减，其对管道失效压力的影响程度远远大于腐蚀缺陷长度。
위료과학지지도DN150승삽관선적사용여관리，채용비선성유한원법대대내부식결함적DN150승삽관선진행료잉여강도적평고。통과분석화계산，연구료부식결함관도、장도화심도대관선겁한승재능력적영향。결과표명：부식결함관도대DN150승삽관선적승재능력영향흔소，가홀략불계；수착부식결함장도적증가，관선적승재능력략미감소，당결함장도체도150 mm，관도실효압력기본불변；수착부식결함심도적증가，관도실효압력정선성체감，기대관도실효압력적영향정도원원대우부식결함장도。
In order to instruct the scientific use and management of DN150 socket pipes,non-linear finite element method is applied to evaluate the residual strength of DN150 socket pipes with internal corrosion defects. The effects of depth,length and width of corrosion defect on the pipe failure pressure is researched through computational analysis. The results show that the effect of corrosion defect width is minor and can be neglected. With the length of corrosion defects increasing,pipes failure pressure is de-creasing fractionally and remains fairly static when the length reaches 150 mm. With the depth of corrosion defects increasing,pipes failure pressure is decreasing linearly. The impact of corrosion defects depth on pipe failure pressure is considerably greater than that of corrosion defect length.