Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model

Mohammad Rahmati; Shayan Norouzi; Hamid Bahai; Giulio Alfano

doi:10.1115/OMAE2015-41816

Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model

Mohammad Rahmati, Shayan Norouzi, Hamid Bahai, Giulio Alfano

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

3 Citations (Scopus)

Abstract

Unbonded flexible risers have become the main means of extracting hydro carbonates from deep waters. So, understanding the complex structural integrity of flexible risers has become a crucial issue for the offshore industry. In this paper, an experimental test and a detailed finite element analyses were carried out on a scaled down model of a flexible riser pipe in order to understand its bending behavior. The model used consists of four layers which include two cylindrical polycarbonate tubes and two steel helical layers. One helical layer, wounded around the pipe assembly, represents the carcass layer in an actual flexible riser whilst the other represents the riser tendon armour layers. The model was subjected to a three point bending load in order to study its bending-curvature behavior. The test data was then compared with the FE numerical results which predicted a similar nonlinear trend but under predicts the strain at tendon layers.

Original language	English
Title of host publication	Proc. ASME. OMAE2015
Place of Publication	New York
Publisher	American Society of Mechanical Engineers (ASME)
Number of pages	7
Volume	5A
ISBN (Print)	9780791856512
DOIs	https://doi.org/10.1115/OMAE2015-41816
Publication status	E-pub ahead of print - 21 Oct 2015
Externally published	Yes
Event	34th International Conference on Ocean, Offshore and Arctic Engineering: ASME 2015 - St. John's, Canada Duration: 31 May 2015 → 5 Jun 2015

Conference

Conference	34th International Conference on Ocean, Offshore and Arctic Engineering
Country/Territory	Canada
City	St. John's
Period	31/05/15 → 5/06/15

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10.1115/OMAE2015-41816

Cite this

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title = "Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model",

abstract = "Unbonded flexible risers have become the main means of extracting hydro carbonates from deep waters. So, understanding the complex structural integrity of flexible risers has become a crucial issue for the offshore industry. In this paper, an experimental test and a detailed finite element analyses were carried out on a scaled down model of a flexible riser pipe in order to understand its bending behavior. The model used consists of four layers which include two cylindrical polycarbonate tubes and two steel helical layers. One helical layer, wounded around the pipe assembly, represents the carcass layer in an actual flexible riser whilst the other represents the riser tendon armour layers. The model was subjected to a three point bending load in order to study its bending-curvature behavior. The test data was then compared with the FE numerical results which predicted a similar nonlinear trend but under predicts the strain at tendon layers.",

author = "Mohammad Rahmati and Shayan Norouzi and Hamid Bahai and Giulio Alfano",

year = "2015",

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booktitle = "Proc. ASME. OMAE2015",

publisher = "American Society of Mechanical Engineers (ASME)",

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note = "34th International Conference on Ocean, Offshore and Arctic Engineering : ASME 2015 ; Conference date: 31-05-2015 Through 05-06-2015",

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Rahmati, M, Norouzi, S, Bahai, H & Alfano, G 2015, Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model. in Proc. ASME. OMAE2015. vol. 5A, OMAE2015-41816, American Society of Mechanical Engineers (ASME), New York, 34th International Conference on Ocean, Offshore and Arctic Engineering, St. John's, Newfoundland and Labrador, Canada, 31/05/15. https://doi.org/10.1115/OMAE2015-41816

TY - CHAP

T1 - Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model

AU - Rahmati, Mohammad

AU - Norouzi, Shayan

AU - Bahai, Hamid

AU - Alfano, Giulio

PY - 2015/10/21

Y1 - 2015/10/21

N2 - Unbonded flexible risers have become the main means of extracting hydro carbonates from deep waters. So, understanding the complex structural integrity of flexible risers has become a crucial issue for the offshore industry. In this paper, an experimental test and a detailed finite element analyses were carried out on a scaled down model of a flexible riser pipe in order to understand its bending behavior. The model used consists of four layers which include two cylindrical polycarbonate tubes and two steel helical layers. One helical layer, wounded around the pipe assembly, represents the carcass layer in an actual flexible riser whilst the other represents the riser tendon armour layers. The model was subjected to a three point bending load in order to study its bending-curvature behavior. The test data was then compared with the FE numerical results which predicted a similar nonlinear trend but under predicts the strain at tendon layers.

AB - Unbonded flexible risers have become the main means of extracting hydro carbonates from deep waters. So, understanding the complex structural integrity of flexible risers has become a crucial issue for the offshore industry. In this paper, an experimental test and a detailed finite element analyses were carried out on a scaled down model of a flexible riser pipe in order to understand its bending behavior. The model used consists of four layers which include two cylindrical polycarbonate tubes and two steel helical layers. One helical layer, wounded around the pipe assembly, represents the carcass layer in an actual flexible riser whilst the other represents the riser tendon armour layers. The model was subjected to a three point bending load in order to study its bending-curvature behavior. The test data was then compared with the FE numerical results which predicted a similar nonlinear trend but under predicts the strain at tendon layers.

U2 - 10.1115/OMAE2015-41816

DO - 10.1115/OMAE2015-41816

M3 - Chapter

SN - 9780791856512

VL - 5A

BT - Proc. ASME. OMAE2015

PB - American Society of Mechanical Engineers (ASME)

CY - New York

T2 - 34th International Conference on Ocean, Offshore and Arctic Engineering

Y2 - 31 May 2015 through 5 June 2015

ER -

Experimental and Numerical Study of the Bending Behavior of a Flexible Riser Model

Abstract

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