Three kinds of models based on the same flexible pipe with 8 layers have been separately created
to investigate the effects of different modeling approaches on numerical simulation results of finite element (FE)
models for unbonded flexible pipes. Then the mechanical property of the unbonded flexible pipe under tension,
torsion and bending load has been analyzed and compared via ABAQUS software on the basis of three created
models. The research shows that different modeling methods of flexible pipes make a great difference in the results.
Especially, modeling simplifications of the carcass and pressure armor have a great impact on the accuracy of the
results. Model 3, in which the carcass is simulated by spiral isotropic shell and other layers are simulated by
solid element, possesses good adaptability, which has been proved by comparing the experiment data and other
models. This paper can offer a reference for the FE modeling methods’ selection and mechanical property analysis
of unbonded flexible pipe.
PANG Guoliang (庞国良), CHEN Chaohe* (陈超核), SHEN Yijun (沈义俊), LIU Fuyong (刘夫永)
. Comparison Between Different Finite Element Analyses of Unbonded Flexible Pipe via Different Modeling Patterns[J]. Journal of Shanghai Jiaotong University(Science), 2019
, 24(3)
: 357
-363
.
DOI: 10.1007/s12204-019-2064-8
[1] RAMOS JR R, PESCE C P, MARTINS C A. Acomparative analysis between analytical and FE-basedmodels for flexible pipes subjected to axisymmetricloads [C]//Proceedings of the 10th InternationalOffshore and Polar Engineering Conference. Seattle,USA: ISOPE, 2000: 80-88.
[2] DE SOUSA J R M, ELLWANGER G B, LIMA E C P,et al. Local mechanical behavior of flexible pipes subjectedto installation loads [C]//Proceedings of the 20thInternational Conference on Offshore Mechanics andArctic Engineering. Rio de Janeiro, Brazil: OMAE,2001: 219-227.
[3] DE SOUSA J R M, MAGLUTA C, ROITMAN N, etal. On the response of flexible risers to loads imposedby hydraulic collars [J]. Applied Ocean Research, 2009,31(3): 157-170.
[4] MERINO H E M, DE SOUSA J R M, MAGLUTAC, et al. Numerical and experimental study of a flexiblepipe under torsion [C]//Proceedings of the 29th InternationalConference on Ocean, Offshore and ArcticEngineering. Shanghai, China: OMAE, 2010: 911-922.
[5] DE SOUSA J R M, VIERO P F, MAGLUTA C, etal. An experimental and numerical study on the axialcompression response of flexible pipes [J]. Journalof Offshore Mechanics and Arctic Engineering, 2012,134(3): 031703.
[6] ZHANG W C, TUOHY J. Application of finite elementmodelling in the qualification of large diameterunbonded flexible risers [C]//Proceedings of the 21stInternational Conference on Offshore Mechanics andArctic Engineering. Oslo, Norway: OMAE, 2002: 425-433.
[7] BAHTUI A, BAHAI H, ALFANO G. A finite elementanalysis for unbonded flexible risers under axial tension[C]//Proceedings of the 27th International Conferenceon Offshore Mechanics and Arctic Engineering. Estoril,Portugal: ASME, 2008: 529-534.
[8] BAHTUI A, BAHAI H, ALFANO G. A finite elementanalysis for unbonded flexible risers under torsion [J].Journal of Offshore Mechanics and Arctic Engineering,2008, 130(4): 041301.
[9] BAHTUI A, BAHAI H, ALFANO G. Numerical andanalytical modeling of unbonded flexible risers [J].Journal of Offshore Mechanics and Arctic Engineering,2009, 131(2): 021401.
[10] WITZ J A. A case study in the cross-section analysis offlexible risers [J]. Marine Structures, 1996, 9: 885-904.
[11] WANG W, CHEN G. Analytical and numerical modelingfor flexible pipes [J]. China Ocean Engineering,2011, 25(4): 737-746.
