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Research Papers: Offshore Technology

On Modeling and Simulation of Innovative Ship Rescue System

[+] Author and Article Information
Ilias Zilakos

School of Naval Architecture
and Marine Engineering,
National Technical University of Athens (NTUA),
9 Heroon Polytechniou Street,
Zografos,
Athens 157-73, Greece
e-mail: izilakos@central.ntua.gr

Michael Toulios

School of Naval Architecture
and Marine Engineering,
National Technical University of Athens (NTUA),
9 Heroon Polytechniou Street,
Zografos,
Athens 157-73, Greece
e-mail: mtoulios@deslab.ntua.gr

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 January 16, 2018; final manuscript received May 10, 2018; published online July 12, 2018. Assoc. Editor: Nianzhong Chen.

J. Offshore Mech. Arct. Eng 140(6), 061303 (Jul 12, 2018) (9 pages) Paper No: OMAE-18-1006; doi: 10.1115/1.4040303 History: Received January 16, 2018; Revised May 10, 2018

Inflatable devices that provide reserve buoyancy to damaged ships, preventing capsizing and/or sinking, along with lifting wreckages from the seabed, were studied within the framework of the European funded project “SuSy” (Surfacing System for Ship Recovery). Part of the work involved material evaluation and testing as well as simulations of the structural response. This paper first describes an orthotropic hyperelastic constitutive model for a candidate material also used in the fabrication of prototype inflatable devices. A strain energy density function is proposed that is further used to derive the stress and elasticity tensors required for the numerical implementation of the model in the user-defined subroutine (UMAT) of abaqus/standard. The second part of the paper presents the finite element simulation of the latter stages of inflation of two salvage devices inside an actual double bottom structure. The numerical results are in good agreement with tests conducted in dry land and under water, with the structure raised following the inflation of the devices. The evolving stress state in both the devices and the double bottom structure under increased contact interaction leads to useful conclusions for future use in the development of this salvage system.

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References

IACS, 2010, Common Structural Rules for Double Hull Tankers, International Association of Classification Societies, London.
Zilakos, I. K. , Karatzas, V. A. , Chatzidouros, E. V. , and Papazoglou, V. J. , 2011, “ Simulation of External Application of SuSy Devices on an Aframax Tanker That Has Been Structurally Compromised,” International Conference on Design and Operation of Tankers, Athens, Greece, June 8–9, pp. 121–130.
Dhanak, M. R. , and Xiros, N. I. , 2016, Springer Handbook of Ocean Engineering, Springer International Publishing, New York. [CrossRef]
Prot, V. , Skallerud, B. , and Holzapfel, G. A. , 2007, “ Transversely Isotropic Membrane Shells With Application to Mitral Valve Mechanics. Constitutive Modelling and Finite Element Implementation,” Int. J. Numer. Methods Eng., 71(8), pp. 987–1008. [CrossRef]
ABAQUS, 2013, ABAQUS Theory Guide, Dassault Systèmes Simulia Corp., Providence, RI.
DIN, 1993, “ Testing of Textiles; Determinations of Mass of Textile Fabrics With the Exception of Knitted Fabrics and Nonwoven,” Deutsches Institut Fur Normung, Berlin, Standard No. DIN 53854. https://infostore.saiglobal.com/store/Details.aspx/Details.aspx?productID=563034
DIN, 1982, “ Testing of Textiles: Determination of the Thickness of Textile Fabrics (except Floor Coverings); Apparent Density Over 0.05 g/cm³,” Deutsches Institut Fur Normung, Berlin, Standard No. DIN 53855.
DIN, 1979, “ Testing of Textiles; Simple Tensile Test on Strips of Textile Fabrics, Woven Fabrics and Ribbons,” Deutsches Institut Fur Normung, Berlin, Standard No. DIN 53857. https://infostore.saiglobal.com/en-au/standards/din-53857-1-1979-09--569927/
ISO, 2000, “ Textiles—Tear Properties of Fabrics—Part 2: Determination of Tear Force of Trouser-Shaped Test Specimens (Single Tear Method),” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO 13937. https://www.iso.org/obp/ui/#iso:std:iso:13937:-2:ed-1:v1:en
Spencer, A. J. M. , 1984, Continuum Theory of the Mechanics of Fibre-Reinforced Composites, Springer-Verlag, Vienna, Italy. [CrossRef]
Holzapfel, G. A. , and Ogden, R. W. , 2009, “ On Planar Biaxial Tests for Anisotropic Nonlinearly Elastic Solids. A Continuum Mechanical Framework,” Math. Mech. Solids, 14(5), pp. 474–489. [CrossRef]
Sun, W. , Chaikof, E. L. , and Levenston, M. E. , 2008, “ Numerical Approximation of Tangent Moduli for Finite Element Implementations of Nonlinear Hyperelastic Material Models,” ASME J. Biomech. Eng., 130(6), p. 061003. [CrossRef]
Stein, E. , and Sagar, G. , 2008, “ Convergence Behavior of 3D Finite Elements for Neo-Hookean Material,” Eng. Comput., 25(3), pp. 220–232. [CrossRef]
Zilakos, I. , and Toulios, M. , 2016, “ Modelling Aspects of Orthotropic Hyperelastic Material Employed in the Design of Innovative Ship Rescue Systems,” Vassilios Papazoglou: A Volume in His Honour, N. Tsouvalis , ed., National Technical University of Athens Press, Athens, Greece, pp. 475–483.
ISO, 1998, “ Rubber- or Plastics-Coated Fabrics—Determination of Tensile Strength and Elongation at Break,” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO 1421. https://www.iso.org/standard/65588.html
Galliot, C. , and Luchsinger, R. H. , 2011, “ Determination of the Response of Coated Fabrics Under Biaxial Stress: Comparison Between Different Test Procedures,” Fifth International Conference on Textile Composites and Inflatable Structures, Structural Membranes, Barcelona, Spain, Oct. 5–7, pp. 636–647. https://www.researchgate.net/publication/288408929_Determination_of_the_response_of_coated_fabrics_under_biaxial_stress_Comparison_between_different_test_procedures
Chen, S. , Ding, X. , Fangueiro, R. , Yi, H. , and Ni, J. , 2008, “ Tensile Behavior of PVC-Coated Woven Membrane Materials Under Uni- and Bi-Axial Loads,” J. Appl. Polym. Sci., 107(3), pp. 2038–2044. [CrossRef]
Bridgens, B. N. , and Gosling, P. D. , 2004, “ Direct Stress-Strain Representation for Coated Woven Fabrics,” Comput. Struct., 82(23–26), pp. 1913–1927. [CrossRef]
Blum, R. , Bögner, H. , Némoz, G. , 2004, “ Testing Methods and Standards,” European Design Guide for Tensile Surface Structures, B. Foster and M. Mollaert , eds., TensiNet, Brussels, Belgium, pp. 294–322.
Galliot, C. , and Luchsinger, R. H. , 2009, “ A Simple Model Describing the Non-Linear Biaxial Tensile Behaviour of PVC-Coated Polyester Fabrics for Use in Finite Element Analysis,” Compos. Struct., 90(4), pp. 438–447. [CrossRef]
MathWorks, 2016, MATLAB and Optimization Toolbox, The MathWorks Inc., Natick, MA.
Ogden, R. W. , Saccomandi, G. , and Sgura, I. , 2004, “ Fitting Hyperelastic Models to Experimental Data,” Comput. Mech., 34(6), pp. 484–502. [CrossRef]
Destrade, M. , Saccomandi, G. , and Sgura, I. , 2017, “ Methodical Fitting for Mathematical Models of Rubber-Like Materials,” Proc. R. Soc. A: Math., Phys. Eng. Sci., 473(2198), p. 20160811.
Oñate, E. , Flores, F. G. , and Marcipar, J. , 2008, “ Membrane Structures Formed by Low Pressure Inflatable Tubes. New Analysis Methods and Recent Constructions,” Textile Composites and Inflatable Structures II, E. Oñate and B. Kröplin , eds., Springer, Dordrecht, The Netherlands, pp. 163–196. [CrossRef]
Arita, S. , Okumiya, T. , and Miyazaki, Y. , 2014, “ Numerical Model for Prediction of Wrinkling Behavior on a Thin-Membrane Structure,” Mech. Eng. J., 1(4), pp. 41–57. [CrossRef]
ISO, 1998, “ Rubber- or Plastics-Coated Fabrics—Determination of Roll Characteristics—Part 2: Methods for Determination of Total Mass per Unit Area, Mass per Unit Area of Coating and Mass per Unit Area of Substrate,” International Organization for Standardization, Geneva, Switzerland, Standard No. ISO 2286-2. https://www.iso.org/standard/25482.html

Figures

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Fig. 1

Actual double bottom structure (left) and a sketch of the half structure with deployed SuSy inflatables (right), where S and P denote starboard and port side, respectively

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Fig. 2

The location and orientation of the four strain gauge rosettes (A1, A2, B1, B2) installed on the two T-profile stiffeners of the inner bottom (see Fig. 1, right)

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Fig. 3

Contact areas between the devices and several structural components of the double bottom compartment

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Fig. 4

Uniformly scaled up deformed shapes of the middle sections of the left and right inflatables at the end of the first analysis step

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Fig. 5

Uniformly scaled up deformed shapes of the middle section of the left and right inflatables at the end of the second simulation step

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Fig. 6

The salvage process: (a) the structure was submerged into water, (b) the structure began to emerge after the activation of the system (no strain on the lifting wires), and (c) the structure remained afloat at its maximum freeboard (approximately 30 cm) at the end of the salvage process

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Fig. 7

Equivalent stress histories computed for the strain gauges installed on the T-profile stiffeners of the top plate (see Fig. 3, sensor B1 malfunctioned)

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Fig. 8

Contour plot of the equivalent stress on half of testbed structure (top). The insets (bottom) depict the top plate stiffeners, where their deformed shape is uniformly scaled up, along with the positions of the active strain gauges installed on the actual testbed structure.

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Fig. 9

Stress ratio along the upper (top) and lower (bottom) segment of the inflatable's longitudinal middle section

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Fig. 10

Stresses along the two material directions for the upper (top) and lower (bottom) section segment of the inflatable

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Fig. 11

Shear forces acting on one inflatable at the end of the first (top) and second (bottom) analysis step

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