Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers

Mohammad Rahmati; Giulio Alfano; Hamid Bahai

doi:10.1115/OMAE2016-54360

Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers

Mohammad Rahmati, Giulio Alfano, Hamid Bahai

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

3 Citations (Scopus)

Abstract

In this paper the implementation of two types of boundaries, periodic and fixed in-plane boundaries, for a detailed finite-element model of flexible risers is discussed. By using three-dimensional elements, all layer components are individually modelled and a surface-to-surface frictional contact model is used to simulate their interaction. The approach is applied on several riser models with various lengths and layers. It is shown that the model with periodic boundaries can be effectively employed in a fully-nested (FE2) multiscale analysis based on computational homogenization. In fact, in this model only a small fraction of a flexible pipe is needed for a detailed nonlinear finite-element analysis at the small scale. The advantage of applying periodic boundary conditions in capturing the detailed nonlinear effects and the efficiencies in terms of significant CPU time saving are demonstrated.

Original language	English
Title of host publication	ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
Subtitle of host publication	Volume 5: Pipelines, Risers, and Subsea Systems
Publisher	American Society of Mechanical Engineers (ASME)
Number of pages	7
Volume	5
ISBN (Electronic)	9780791849965
DOIs	https://doi.org/10.1115/OMAE2016-54360
Publication status	Published - 19 Jun 2016
Externally published	Yes
Event	ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering - Busan, Korea, Republic of Duration: 19 Jun 2016 → 24 Jun 2016

Conference

Conference	ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering
Country/Territory	Korea, Republic of
City	Busan
Period	19/06/16 → 24/06/16

Access to Document

10.1115/OMAE2016-54360

Cite this

Rahmati, M., Alfano, G., & Bahai, H. (2016). Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers. In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5: Pipelines, Risers, and Subsea Systems (Vol. 5). [OMAE2016-54360] American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/OMAE2016-54360

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title = "Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers",

abstract = "In this paper the implementation of two types of boundaries, periodic and fixed in-plane boundaries, for a detailed finite-element model of flexible risers is discussed. By using three-dimensional elements, all layer components are individually modelled and a surface-to-surface frictional contact model is used to simulate their interaction. The approach is applied on several riser models with various lengths and layers. It is shown that the model with periodic boundaries can be effectively employed in a fully-nested (FE2) multiscale analysis based on computational homogenization. In fact, in this model only a small fraction of a flexible pipe is needed for a detailed nonlinear finite-element analysis at the small scale. The advantage of applying periodic boundary conditions in capturing the detailed nonlinear effects and the efficiencies in terms of significant CPU time saving are demonstrated.",

keywords = "Risers (Casting), Pipes, Pipeline risers, Boundary-value problems, Finite element analysis, Flexible risers, Finite element model",

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

year = "2016",

month = jun,

day = "19",

doi = "10.1115/OMAE2016-54360",

language = "English",

volume = "5",

booktitle = "ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering",

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

address = "United States",

note = "ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering ; Conference date: 19-06-2016 Through 24-06-2016",

}

Rahmati, M, Alfano, G & Bahai, H 2016, Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers. in ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5: Pipelines, Risers, and Subsea Systems. vol. 5, OMAE2016-54360, American Society of Mechanical Engineers (ASME), ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering, Busan, Korea, Republic of, 19/06/16. https://doi.org/10.1115/OMAE2016-54360

Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers. / Rahmati, Mohammad; Alfano, Giulio; Bahai, Hamid.
ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5: Pipelines, Risers, and Subsea Systems. Vol. 5 American Society of Mechanical Engineers (ASME), 2016. OMAE2016-54360.

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

TY - CHAP

T1 - Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers

AU - Rahmati, Mohammad

AU - Alfano, Giulio

AU - Bahai, Hamid

PY - 2016/6/19

Y1 - 2016/6/19

N2 - In this paper the implementation of two types of boundaries, periodic and fixed in-plane boundaries, for a detailed finite-element model of flexible risers is discussed. By using three-dimensional elements, all layer components are individually modelled and a surface-to-surface frictional contact model is used to simulate their interaction. The approach is applied on several riser models with various lengths and layers. It is shown that the model with periodic boundaries can be effectively employed in a fully-nested (FE2) multiscale analysis based on computational homogenization. In fact, in this model only a small fraction of a flexible pipe is needed for a detailed nonlinear finite-element analysis at the small scale. The advantage of applying periodic boundary conditions in capturing the detailed nonlinear effects and the efficiencies in terms of significant CPU time saving are demonstrated.

AB - In this paper the implementation of two types of boundaries, periodic and fixed in-plane boundaries, for a detailed finite-element model of flexible risers is discussed. By using three-dimensional elements, all layer components are individually modelled and a surface-to-surface frictional contact model is used to simulate their interaction. The approach is applied on several riser models with various lengths and layers. It is shown that the model with periodic boundaries can be effectively employed in a fully-nested (FE2) multiscale analysis based on computational homogenization. In fact, in this model only a small fraction of a flexible pipe is needed for a detailed nonlinear finite-element analysis at the small scale. The advantage of applying periodic boundary conditions in capturing the detailed nonlinear effects and the efficiencies in terms of significant CPU time saving are demonstrated.

KW - Risers (Casting)

KW - Pipes

KW - Pipeline risers

KW - Boundary-value problems

KW - Finite element analysis

KW - Flexible risers

KW - Finite element model

U2 - 10.1115/OMAE2016-54360

DO - 10.1115/OMAE2016-54360

M3 - Chapter

VL - 5

BT - ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering

PB - American Society of Mechanical Engineers (ASME)

T2 - ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering

Y2 - 19 June 2016 through 24 June 2016

ER -

Periodic and Fixed Boundary Conditions for Multi-Scale Finite Element Analysis of Flexible Risers

Abstract

Conference

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