Abstract

The purpose of the study is to protect the safety of the submarine pipelines by establishing and analyzing mechanical model of the overhanging pipeline. The calculation equations of the force and deformation of the overhanging pipeline are presented in this study. In especial, the transition section is introduced to analyze the overhanging oil pipeline. The calculation equations of the moment, stress and deformation of the overhanging pipeline by considering the premise of sediment reaction are created. The software FORTRAN is used to carry out numerical simulation and the changing laws of bending moment, stress and deformation of overhanging pipeline are obtained. On the basis, the calculation equations of maximum bending moment, maximum stress and maximum deformation can be also obtained. Therefore, theoretical support for calculating submarine pipelines is provided, which has great significance for the analysis and treatment of the overhanging of submarine pipelines.

Keywords:

Bending moment, deformation, overhanging, stress, submarine pipelines,

References

1. Deng, D.P., H.X. Zhou and Y.P. Xing, 1998. Calulation of pipeline inner force and distortion during transverse landslide body. Oil Gas Storage Transport., l7(7): l8-22 (In Chinese).
   
2. Gong, A.M., S.Y. Fu and H.Y. Huang, 2004. The application of ANSYS in filled conduit analysis. J. Anhui Inst. Archit. Ind., 12(5): 51-55 (In Chinese).
   
3. Luo, S. and J.H. Wang, 2009. Study of the critical length for oil pipe line on the turbulent impact vibration. Nat. Gas Oil, 27(4): 13-15 (In Chinese).
   
4. Wang, W. and Z. Lian, 1997. A study on the calculation model of vertical pipe. Nat. Gas Ind., 17(5): 63-66 (In Chinese).
   
5. Wang, F.H., X.W. Zhao and H.Y. Wang, 2004. Mechanics analysis and calculation of the high pressure pipe at loess collapse situation. Oil Gas Storage Transport., 23(6): 25-27 (In Chinese).
   
6. Yang, Y., B.D. Yan and K.X. Liao, 2011. Computing analysis of the suspended segment stress of oil pipelines. Acta Petrol. Sin., 32(5): 911-914 (In Chinese).
   
7. Zhang, R.P. and R.R. Wang, 2013. Application of the direct discontionuous galerkin finite element method for the calculation of soil temperature field of oil pipeline. J. Liaoning Shihua Univ., 33(2): 36-38 (In Chinese).
   
8. Zhang, K.Y., Y. Wang and Y.B. Ai, 2010. Analytical solution to interaction between pipelines and soils under arbitrary loads. Chinese J. Geotech. Eng., 32(8): 1189-1193 (In Chinese).
   
9. Zhao, Z.G., A.L. Yao and X.F. Zhao, 2006. The type of geological hazard long-distance pipeline, the prevention and control measures and prediction methods. Petrol. Eng. Construct., 32(1): 7-12 (In Chinese).
   

Competing interests

The authors have no competing interests.

Open Access Policy

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Copyright

The authors have no competing interests.