Seismic Dynamic Response Analysis Of Corroded Defects Of Buried Pipeline In Cold Region

The Sino-Russian oil pipeline will pass through areas of high cold and high intensity.Due to the high temperature and high temperature in the cold and highintensity areas,the terrain is complex,and the crustal movement is frequent,making earthquakes the main disaster that causes pipeline damage.Therefore,it is of great significance to study the seismic dynamic response of buried pipeline corrosion defects at different temperatures.In this paper,the nonlinear analysis model of soil is adopted,the coupling effect between the pipe and soil is considered,and the Moore-Coulomb model in ABAQUS is used to establish the pipe-soil interaction model,which is tested and verified,and then on this basis.The depth-to-thickness ratio of pipeline corrosion was selected as 20%.The seismic dynamic response of buried pipeline corrosion defects in cold regions was studied by different factors.The main contents are as follows:(1)The establishment of a nonlinear analysis model was studied,the coupling effect between the pipe and soil was considered,and the Moore-Coulomb model was used to establish the pipe-soil interaction model,which was tested and verified.(2)The ABAQUS finite element software was used to study the changes of axial stress and displacement at the corrosion defects of the pipeline under the temperature gradient of room temperature,-5?,-10? and-15?,and analyze its Mises stress Take a point every 3m on the right side of the corrosion defect to study its stress change.(3)To ensure that other research conditions are analyzed by changing the peak acceleration,the coefficient of friction between the pipe and the soil,and the type of soil body.