压力容器2025，Vol.42Issue(4)：56-63,8.DOI:10.3969/j.issn.1001-4837.2025.04.008
含划痕-凹陷组合缺陷管道屈曲失稳机理及极限承载能力研究
Study on buckling instability mechanism and ultimate load-bearing capacity of pipelines with dent-gouge combined defects
摘要
Abstract
To investigate the bending failure behavior of pipelines with dent-gouge combined defects,a numerical model for buckling failure of pipelines containing dent-gouge combined defects was established based on nonlinear finite element analysis.Sensitivity of different parameters to the ultimate bending moment capacity of pipelines with dent-gouge combined defects was analyzed through calculations,revealing the buckling instability mechanism of defective pipelines.Results show that as dent depth increases,the critical buckling moment of pipelines gradually decreases.The critical buckling moment increases with larger pipe diameter and wall thickness.Increasing internal pressure enhances the critical buckling moment to some extent,but when internal pressure increases beyond a certain level,the critical buckling moment decreases.Gouge length is the dominant controlling factor affecting pipeline load-bearing capacity;as gouge length increases,the weakening effect on ultimate bending moment capacity becomes more pronounced.These findings provide scientific basis for integrity assessment of pipelines with dent-gouge combined defects.关键词
凹陷-划痕组合缺陷/管道/屈曲失稳/有限元分析/完整性评价Key words
dent-gouge combined defect/pipeline/buckling instability/finite element analysis/integrity assessment分类
机械制造引用本文复制引用
张俊杰,曹胜,王俊强,帅义,周翰宸,田野,张晓兵,任运波,卢泓方..含划痕-凹陷组合缺陷管道屈曲失稳机理及极限承载能力研究[J].压力容器,2025,42(4):56-63,8.基金项目
国家重点研发计划项目(2024YFC3014201,2022YFC3004802-4) （2024YFC3014201,2022YFC3004802-4）
国家自然科学基金项目(52204071) （52204071）
中国石油大学(北京)优秀青年学者科学基金项目(2462023QNXZ006) （北京）
