摘要
利用X80材料在高压氢环境下的慢应变速率拉伸试验数据,建立输氢管道的非线性材料模型,同时考虑土体材料非线性、管道几何变形非线性以及管土接触非线性等特征,利用ABAQUS模拟研究了埋地X80输氢管道在走滑断层下的力学响应,给出了管道的许用压缩应变值,讨论了断层位移量、输氢压力、断层角等参数对管道失效模式的影响,结果表明:输氢压力对管道的整体应变水平影响较小,管道应变主要由管土相对位移引起,内压引起的薄膜应变可忽略;断层角对管道失效模式具有显著的影响,当断层角小于75°时,管道易发生屈曲失效,当断层角大于75°时,管道易发生拉裂失效。
The nonlinear pipeline material model was established using the slow strain rate tensile test data of material X80 in high pressure hydrogen environment,meanwhile,the mechanical response of buried X80 pipeline under the strike-slip fault was simulated by ABAQUS and the allowable compressive strain was given by considering the characteristics such as the nonlinearity of soil mass,nonlinearity of geometric deformation of pipeline and nonlinearity of contact between soil mass and pipeline.Furthermore,the effects of parameters such as fault displacement,hydrogen pressure and fault angle on failure modes of pipeline were also investigated.The result shows that hydrogen pressure has little effect on the overall strain level of the pipeline,and the strain of the pipeline is mainly caused by the relative displacement between the pipeline and the soil mass.The strain of thin film caused by internal pressure can be neglected.The fault angle has a significant influence on the failure mode of the pipeline.When the fault angle is less than 75°,the pipeline is prone to local buckling due to excess axial compression strain,when the fault angle is greater than 75°,the pipeline is prone to rupture due to excess axial tensile strain.
作者
刘自亮
熊思江
郑津洋
张银广
花争立
顾超华
Liu Ziliang;Xiong Sijiang;Zheng Jinyang;Zhang Yinguang;Hua Zhengli;Gu Chaohua(Institute of Process Equipment,Zhejiang University,Hangzhou 310027,China;High-pressure Process Equipment and Safety Engineering Research Center of Ministry of Education,Hangzhou 310027,China;Hydrogen Energy Technology Development Co.,Ltd.,State Power Investment Corporation Limited,Beijing 102209,China;State Key Laboratory of Fluid Power&Mechatronic Systems,Hangzhou 310027,China)
出处
《压力容器》
北大核心
2020年第8期52-58,78,共8页
Pressure Vessel Technology
基金
国家重点研发计划项目(2018YFF0215100)。
关键词
输氢管道
走滑断层
X80
许用应变
失效模式
hydrogen pipeline
strike-slip fault
X80
allowable strain limit
failure mode
