摘要
为研究弯矩、轴力等外部载荷以及缺陷参数对含腐蚀缺陷高钢级管道失效压力的影响,采用非线性有限元方法,建立弯矩、轴力载荷与内压共同作用下管道有限元模型,分析了弯矩、轴力载荷大小、腐蚀缺陷参数以及管道径厚比等因素对管道失效压力的影响规律。结果表明:弯矩和轴力载荷均会降低管道失效压力,轴力载荷作用下失效压力的下降幅度更大。缺陷参数各影响因素对管道失效压力下降趋势影响从强到弱依次为缺陷深度、缺陷长度、缺陷宽度。失效压力随缺陷深度增大呈线性下降。缺陷长度系数大于6时,失效压力下降趋势逐渐减缓。随缺陷宽度增大,较大的轴力载荷能显著降低失效压力。管道的径厚比越大,管道失效压力越大。
In order to study the influence of external loads such as bending moment,axial force and defect parameters on the failure pressure of high steel grade pipelines with corrosion defects,a finite element model of pipelines under the joint action of bending moment,axial force load and internal pressure was established by using nonlinear finite element method,and the influence rules of factors such as bending moment,axial force load,corrosion defect parameters and pipe diameter to thickness ratio were analyzed.The results showed that both bending moment and axial load could reduce the failure pressure of the pipeline,and the failure pressure decreased more under the action of axial load.The influencing factors of defect parameters on the decline trend of pipeline failure pressure were defect depth,defect length and defect width in order from strong to weak.The failure pressure decreased linearly with the increase of defect depth.When the length coefficient of defect length was greater than 6,the failure decline trend gradually slowed down.With the increase of defect width,the larger axial load could significantly reduce the failure pressure.The greater the ratio of diameter to thickness,the greater the failure pressure.
作者
张昊宇
张引弟
贺翔
黄孝红
ZHANG Hao-yu;ZHANG Yin-di;HE Xiang;HUANG Xiao-hong(School of Petroleum Engineering,Yangtze University,Wuhan Hubei 430100,China;Tianyuan Holding Group Co.,Ltd.,Wuhan Hubei 430100,China)
出处
《当代化工》
CAS
2023年第10期2511-2515,2520,共6页
Contemporary Chemical Industry
基金
国家自然科学基金项目,油气/水蒸气扩散火焰碳烟生成化学动力学与作用机理研究(项目编号:51974033)。
关键词
X80管道
腐蚀缺陷
失效压力
有限元方法
X80 pipeline
Corrosion defect
Failure pressure
Finite element method
