Hydroelasticity of the barge near island affected by bathymetry based on THAFTS software

Abstract

Floating structures are sometimes deployed in shallow water areas close to reefs and islands as facilities serving tourists. In contrast to the open sea, the marine environment, such as wave and current, in the nearshore shallow water area will be affected by the non-uniform complex seabed bottom, and the hydrodynamic interaction between the floating structure and the seabed bathymetry should be investigated, instead of being ignored as the case when a uniform seabed is assumed. A hydroelastic analysis method for slowly varying water depths is proposed to calculate the hydroelastic responses of the floating structures, considering the seabed as a fixed boundary condition. This method was integrated into the software THAFTS (Three Dimension Hydroelastic Analysis of Floating and Translating, developed by China Ship Scientific Research Center). Based on the THAFTS software, the three-dimensional hydroelastic motion response analysis of a barge is carried out, in which the effects of different water depths and the complex bathymetry are investigated by comparing the results of the motion and structural responses of the barge. The stress distribution of the barge with the effect of the bathymetry taken into account is presented in this article as well as the modal stresses. The strength evaluation of the barge indicates that the effect of the inhomogeneous seabed plays a large role in the dynamic responses of the barge when it is deployed near reefs.

Keywords

THAFTS software hydroelasticity bathymetry variable water depth message passing interface

Get full access to this article

View all access options for this article.

References

. Hydroelasticity of floating bodies. PhD Thesis, Brunel University London, London, 1984.

Dewi

FDE

Liapis

Plaut

. Three-dimensional analysis of wave attenuation by a submerged, horizontal, bottom-mounted, flexible shell. Ocean Eng 1999; 26(9): 813–839.

Athanassoulis

Belibassakis

. A novel coupled-mode theory with application to hydroelastic analysis of thick, non-uniform floating bodies over general bathymetry. Proc IMechE, Part M: J Engineering for the Maritime Environment 2009; 223(2): 419–438.

Belibassakis

Athanassoulis

. A coupled-mode model for the hydroelastic analysis of large floating bodies over variable bathymetry regions. J Fluid Mech 2005; 531(3): 221–249.

Gerostathis

Belibassakis

Athanassoulis

. 3D hydroelastic analysis of very large floating bodies over variable bathymetry regions. J Ocean Eng Mar Energy 2016; 2: 159–175.

Andrianov

Hermans

. The influence of water depth on the hydroelastic response of a very large floating platform. Mar Struct 2003; 16(5): 355–371.

Sun

Cui

Liu

. Hydroelastic response of very large floating structures over 2D variable bottom. J Shanghai Jiaotong Univ 2003; 37(8): 1172–1175.

Yang

Yao

. Experimental research of the hydroelastic response of box-typed VLFS in non-uniform sea environment. Ocean Eng 2004; 22(1): 1–8.

Song

Tao

Cui

, et al. Hydroelastic response of VLFS on uneven sea bottom. In: Proceedings of the 24th international conference on offshore mechanics and arctic engineering (OMAE2005-67557), https://www.researchgate.net/publication/29453994_Hydroelastic_Response_of_VLFS_on_Uneven_Sea_Bottom

10.

Kyoung

Hong

Kim

, et al. Hydroelastic response of a very large floating structure over a variable bottom topography. Ocean Eng 2005; 32(17): 2040–2052.

11.

Lin

. A multiple-layer σ-coordinate model for simulation of wave-structure interaction. Comput Fluids 2006; 35(2): 147–167.

12.

Buchner

. The motions of a ship on a sloped seabed. In: Proceedings of the 25th international conference on offshore mechanics and arctic engineering (OMAE2006-92321), https://www.researchgate.net/publication/267650984_The_Motions_of_a_Ship_on_a_Sloped_Seabed

13.

Ferreira

Newman

. Diffraction effects and ship motions on an artificial seabed. In: Proceedings of the 24th international workshop on water waves and floating bodies, 2009, http://www.iwwwfb.org/Abstracts/iwwwfb24/iwwwfb24_25.pdf

14.

Hauteclocque

Rezende

Giorgiutti

, et al. Wave kinematics and seakeeping calculation with varying bathymetry. In: Proceedings of the 28th international conference on ocean, offshore and arctic engineering (OMAE2009-79517), https://marine-offshore.bureauveritas.com/sites/g/files/zypfnx136/files/pdf/Wave%20kinematics%20and%20seakeeping%20calculations%20with%20vaying%20bathymetry.pdf

15.

Utsunomiya

Watanabe

Noguchi

, et al. Hydroelastic analysis of a hybrid-type VLFS in water of variable depth. In: Proceedings of the 27th international conference on offshore mechanics and arctic engineering (OMAE 2008-57180), http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1633304

16.

Pinkster

. A multi-domain approach in 3-D diffraction calculations. In: Proceedings of the 30th international conference on ocean, offshore and arctic engineering (OMA E2011-49414), https://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1623812

17.

Zou

Liu

. A three-dimensional sono-elastic method of ships in finite depth water with experimental validation. Ocean Eng 2018; 164: 238–247.

18.

Zou

Tian

, et al. Theory and applications of coupled fluid-structure interactions of ships in waves and ocean acoustic environment. J Hydrodyn 2016; 28(6): 923–936.

19.

Tian

Liu

. Hydroelastic investigation on floating body near islands and reefs. In: Proceedings of the 11th international conference on hydrodynamics (ICHD2014), Nanyang Technological University (NTU), Singapore, October 19–24, 2014.

20.

Tian

Ding

, et al. Theoretical study on hydroelastic responses of very large floating structures near islands and reefs. In: Proceedings of the 33rd international conference on ocean, offshore and arctic engineering (OMAE2014-24704), http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1912134

21.

Yang

Tian

, et al. Numerical study of 3D pulsating source green function of finite water depth. In: Proceedings of the 33rd international conference on ocean, offshore and arctic engineering (OMAE2014-24703), https://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1912133

22.

Yang

Liu

Ding

, et al. Hydroelastic responses of a VLFS in the waves influenced by complicated geographic environment. In: Proceedings of the 7th international conference on hydroelasticity in marine technology, University of Zagreb, Split, Croatia, September 16–19, 2015.