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IJSTR >> Volume 3- Issue 3, March 2014 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Effect Of Material Nonlinearity On Submarine Pipeline During Laying

[Full Text]

 

AUTHOR(S)

Dr. Hakim Saeed Muhammed, Dr. Karim Radhi Obead, Anwar Sabah Abd Alameer

 

KEYWORDS

Index Terms: Material, Nonlinearity, Bending moments, Deflections, Stresses

 

ABSTRACT

Abstract: The main causes of nonlinearity are the large deformations attained to a structural member which is related to the geometrical shape of that member. This is called geometric nonlinearity whilst the other nonlinearity is due to material behavior under load application. In this study a submarine pipelines are taken into considerately. The two mentioned nonlinearities are facing workers in structural pipeline analysis. The present paper focuses on the effect of material nonlinearity. It was tested though the use of OFFPIPE famous software. The effect of material nonlinearity was studied through the obtained bending moments, deflections and stresses when the pipe exposed to depth variation, diameter variation, tension variation and thickness variation. It was noted that if material nonlinearity is taken into consideration the governed maximum bending moments were less by about two times compared to linear approach.

 

REFERENCES

[1] Wriggers, P., " Nonlinear Finite Element Methods", 2008.

[2] Braestrup, M. W., Andersen, J. B., Andersen, L. W., Bryndum, M., Christensen, C. J. and Nielsen N., "Design and Installation of Marine Pipelines", Blackwell Science Ltd, 2005.

[3] Wismar, H., " Nonlinear Finite Element Analysis", Technical University of Košice, Slovakia, June 2011.

[4] Malahy, R.C.Jr.,"OFFPIPE - Offshore pipeline analysis system",Version 2.04X ,Copyright© 1995.

[5] Det Norske Veritas,'' DNV-OS-F101- Submarine Pipeline Systems", Offshore Standard, August 2012.

[6] Malahy, R.C.Jr., " A Nonlinear Finite Element Method For The Analysis Of The Offshore Pipelaying Problem", A Thesis Submitted In Partial Fulfillment Of The Requirements For The Degree Doctor Of Philosophy, Houston, Texas, May, 1985.