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Numerical computation of impact on buried gas pipeline by different rocks

WAN Fu,ZHOU Zhaoming,HUANG Tao,ZHOU Yonglin(Safety,Environment,Quality,Supervision & Testing Research Institute,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Guanghan 618300,Sichuan,China)  
As to the issue that the dangerous rock on the upper part mountain easily threat on the high-pressure gas pipeline which is buried in the lower part of the mountain,the finite element model of buried pipeline impacted by different sizes of rocks are established in ANSYS Workbench.The displacement of rocks which intrude into the soil and the stress of impacted buried gas pipeline are calculated by using ANSYS/LS_DYNA.Then the damage of buried gas pipeline is obtained in different rock-fall impact accident.The computation results can provide references for the construction and safe operation of high pressure gas pipeline.
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