摘要
在天然气输送工程中，广泛存在着管道的氢损伤问题。根据内聚力损伤模型，结合权函数方法，通过计算数学裂纹长度，提出了含轴向裂纹管道在温差作用下氢环境中承载能力的评估方法。分析表明，随着裂纹尖端氢的浓度增大，裂纹尖端的内聚力减小，数学裂纹长度增大，管道的承载能力大为降低。裂纹原始长度越大，管道承载能力越低。
Hydrogen damage problem of pipelines exists extensively in natural gas transportation engineering. On the basis of cohensive force degrading mechanism, combined with weight function method, a method of thermal bearing capacity assessment of pipeline with axial crack in hydrogen enviroment loaded by temperature differential is presented through calculation of mathematical crack length. It shows that with the increase of hydrogen concentration in crack tip, the cohensive force decreases and mathematical crack length enlarges, which result in the degrading of bearing capacity of pipeline.Meanwhile,with the increase of original crack length, the bearing capacity of pipeline is degraded.
出处
《石油化工设备》
CAS
2000年第1期26-29,共4页
Petro-Chemical Equipment
关键词
输气管道
热承载能力
内聚力
天然气管道
裂纹
gas pipeline
hydrogen enviroment
thermal bearing capacity
cohensive force
