@article { author = {Soukhak Lari, Ali and Rahbar Ranji, Ahmad and Bahmani Shourijeh, Mostafa and Soukhak Lari, Mehdi}, title = {Numerical Analysis of Upheaval Buckling of Pipeline on Uneven Seabed Using Finite Element Method}, journal = {Journal of Coastal and Marine Engineering}, volume = {1}, number = {1}, pages = {53-57}, year = {2018}, publisher = {Iranian Coastal and Marine Structural Engineering Association}, issn = {2645-436X}, eissn = {2645-4378}, doi = {}, abstract = {When subsea pipelines are laid down on the uneven seabed or buried in the seafloor, they may experience upheaval buckling. This condition, which is associated with high temperature and high pressure (HT/HP) of oil in the pipeline leads to large displacement. Finally, bending moment and effective axial force are produced. This way, the cross section of the pipeline may experience failure. In this research, a pipeline on the seabed is simulated employing ABAQUS software, and various influential factors such as the friction coefficient of seabed soil, external and internal hydrostatic pressure and temperature changes in the process of creating upheaval buckling are assessed. The results show that the friction coefficient of soil have much more effect than the other parameters. Furthermore, the pipeline would be unstable when the efficacious axial force increases. }, keywords = {Numerical analysis,Subsea Pipeline,Initial Imperfection,Upheaval Buckling,FEM}, url = {https://www.jcme-journal.com/article_58560.html}, eprint = {https://www.jcme-journal.com/article_58560_4822b39c5039e012bedcd3b5168a3cfc.pdf} }