Mechanical Analysis of Buried Pipes with Double Point Corrosion by Impact Action
Falling rock impact action on buried pipeline is very likely to cause great damage,seriously affecting the safe operation of the pipeline.Affected by the environment and transport medium,long-distance pipeline corrosion often does not occur with a single defect.When the pipeline produces two or more defects,which may lead to a more complex situation.Combined with the current situation of domestic and foreign research,the ABAQUS software was used to build a circular and axial dual-point corrosion finite element model,the mechanical analysis of the internal pressure of the pipeline,falling stone impact velocity,corrosion defect size and other parameters was carried out.The research results show that:axial and circumferential dual-point corrosion stress-strain change law curves are roughly similar,the axial dual-point corrosion sensitivity is high,more likely to suffer damage failure.The influence of pipeline pressure,defect depth and falling rock impact velocity on the double point corrosion pipe is significant,corrosion deepening is very easy to cause damage to the pipe failure,the influence of corrosion length and corrosion width of the pipe on stress and strain is small.For the pipeline through the collapse area,which can be taken to increase the wall thickness,pipe burial depth and set up protective network and other measures to reduce the damage of falling rocks on the pipeline,effectively enhance the overall safety of the pipeline.
double point corrosionburied pipesrockfall impactfinite elementX70
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