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Research Papers: Materials Technology

Design of Cross-Sectional Layout of Steel Tube Umbilical

[+] Author and Article Information
Qingzhen Lu

Department of Ocean Science and Technology,
Dalian University of Technology,
2 Dagong Road,
Panjin, China
e-mail: luqingzhen@dlut.edu.cn

Zhixun Yang

Department of Engineering Mechanics,
Dalian University of Technology,
2 Linggong Road,
Dalian, China
e-mail: yangzhixun@aliyun.com

Jun Yan

Department of Engineering Mechanics,
Dalian University of Technology,
2 Linggong Road,
Dalian, China
e-mail: yanjun@dlut.edu.cn

Qianjin Yue

Department of Ocean Science and Technology,
Dalian University of Technology,
2 Dagong Road,
Panjin, China
e-mail: yueqj@dlut.edu.cn

1Corresponding author.

Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received April 6, 2012; final manuscript received May 28, 2014; published online July 9, 2014. Assoc. Editor: Xin Sun.

J. Offshore Mech. Arct. Eng 136(4), 041401 (Jul 09, 2014) (7 pages) Paper No: OMAE-12-1034; doi: 10.1115/1.4027800 History: Received April 06, 2012; Revised May 28, 2014

A design method is presented, which aims at the optimal cross-sectional layout of the multilayer steel tube umbilical. The merit of the method is to improve the tension stiffness and the fatigue life of umbilical. An optimization model is developed for arranging each component layer of the layout by considering the symmetry of mechanical performances of components. Finite element analysis (FEA) is carried out to check the contact force and the radial deformation of different layout types and to confirm the optimal layout design.

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References

Figures

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Fig. 1

Configuration of steel tube umbilical

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Fig. 2

Contact pressure acting on the core

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Fig. 3

Schematic representation of contact force between components. A represents the steel tube, B represents the electrical cable, C represents the optical fiber cable, and D represents the filler.

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Fig. 4

Flowchart of layout design

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Fig. 5

Symmetric lines of different arrangements

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Fig. 6

n polygon of arrangement

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Fig. 7

Flow process chart of design method

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Fig. 8

Simplification of electrical cable and optical fiber cable

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Fig. 9

Alternative arrangements of the umbilical

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Fig. 10

Diagrammatic sketches of the arrangement results

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Fig. 11

FEA models of two kinds of layout types

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Fig. 12

The contact stress nephograms of two kinds of layout types

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Fig. 13

Radial displacement distribution of two layout types

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