The role of a vertical flexible porous barrier of two different configurations, namely (i) surface-piercing barrier (SPB) and (ii) bottom-standing barrier (BSB) in the mitigation of hyroelastic responses of a very large floating structure (VLFS) is analysed. Both the flexible barrier and the floating plate are modelled using Euler-Bernoulli beam equation under the assumption of small amplitude structural response. The solution of the associated mathematical problem is obtained using the eigenfunction expansion method. Various results illustrating the effect of the barrier length, porous-effect parameter, and the barrier-VLFS spacing on various hydroelastic responses of the VLFS are presented. Moreover, results on barrier deflection and overturning moments of the flexible porous barrier for various structural parameters are presented. Energy identity is derived using Green’s identity and used to check the accuracy of the computational results. The study reveals that for suitable values of the structural flexibility, porosity and barrier configurations, wave-induced structural responses on the VLFS and barriers can be reduced significantly. Moreover, the study depicts that the presence of flexible porous barriers can significantly reduce the wave reflection and wave forces exerted on the floating elastic plate.
WangCMTayZYTakagiK, et al. Literature review of methods for mitigating hydroelastic response of VLFS under wave action. Appl Mech Rev2010; 63(3): 030802.
2.
WangCMTayZY.Very large floating structures: applications, research and development. Procedia Eng2011; 14: 62–72.
3.
KohoutALMeylanMHSakaiS, et al. Linear water wave propagation through multiple floating elastic plates of variable properties. J Fluid Struct2007; 23(4): 649–663.
MengQRLuDQ.Wave-induced hydrodynamic responses of a rigid body connected with elastic plates floating on a two-layer fluid. J Fluid Struct2017; 68: 295–309.
6.
WatanabeEUtsunomiyaTKuramotoM, et al. Wave response analysis of vlfs with an attached submerged plate. Mar Struct2003; 13(03): 190–197.
7.
WatanabeEUtsunomiyaTOhtaH, et al. Wave response analysis of VLFS with an attached submerged plate: verification with 2-d model and some 3-d numerical examples. In: Proceedings of international symposium on ocean space utilization technology, 2003, pp.147–154. Tokyo: National Maritime Research Institute.
8.
WangCGaoRKohC, et al. Novel hybrid system for reducing hydroelastic response of very large floating structures. In: 31st ASME international conference on ocean, offshore and arctic engineering (OMAE2012), Rio de Janeiro, Brazil, 1–6 July 2012, vol. 44946, pp. 7–14. New York, NY: ASME.
9.
KhabakhpashevaTIKorobkinAA.Hydroelastic behaviour of compound floating plate in waves. J Eng Math2002; 44(1): 21–40.
10.
GaoRPWangCMKohCG.Reducing hydroelastic response of pontoon-type very large floating structures using flexible connector and gill cells. Eng Struct2013; 52: 372–383.
11.
YoonJSChoSPJiwinangunRG, et al. Hydroelastic analysis of floating plates with multiple hinge connections in regular waves. Mar Struct2014; 36: 65–87.
12.
ChengYJiCZhaiG, et al. Dual inclined perforated anti-motion plates for mitigating hydroelastic response of a vlfs under wave action. Ocean Eng2016; 121: 572–591.
13.
SinglaSBeheraHMarthaSC, et al. Scattering of obliquely incident water waves by a surface-piercing porous box. Ocean Eng2019; 193: 106577.
14.
VijayKGNishadCSNeelamaniS, et al. Gravity wave interaction with a wave attenuating system. Appl Ocean Res2020; 101: 102206.
15.
VijayKNeelamaniSNishadC, et al. Gravity wave interaction with multiple submerged artificial reefs. Proc IMechE, Part M: J Engineering for the Maritime Environment2021; 235(2): 607–622.
16.
WangKRenX.Water waves on flexible and porous breakwaters. J Eng Mech1993; 119(5): 1025–1047.
WilliamsANWangKH.Flexible porous wave barrier for enhanced wetlands habitat restoration. J Eng Mech2003; 129(1): 1–8.
19.
Suresh KumarPManamSRSahooT. Wave scattering by flexible porous vertical membrane barrier in a two-layer fluid. J Fluid Struct2007; 23(4): 633–647.
20.
MandalSDattaNSahooT.Hydroelastic analysis of surface wave interaction with concentric porous and flexible cylinder systems. J Fluid Struct2013; 42: 437–455.
21.
KoleySKaligatlaRBSahooT.Oblique wave scattering by a vertical flexible porous plate. Stud Appl Math2015; 135(1): 1–34.
22.
BeheraHSahooT.Hydroelastic analysis of gravity wave interaction with submerged horizontal flexible porous plate. J Fluid Struct2015; 54: 643–660.
23.
BeheraHMandalSSahooT.Oblique wave trapping by porous and flexible structures in a two-layer fluid. Phys Fluids2013; 25(11): 112110.
24.
KoleySSahooT.Oblique wave trapping by vertical permeable membrane barriers located near a wall. J Mar Sci Appl2017; 16(4): 490–501.
25.
SinglaSMarthaSCSahooT.Mitigation of structural responses of a very large floating structure in the presence of vertical porous barrier. Ocean Eng2018; 165: 505–527.
26.
SinglaSSahooTMarthaSC, et al. Effect of a floating permeable plate on the hydroelastic response of a very large floating structure. J Eng Math2019; 116(1): 49–72.
27.
GayathriRKarPBeheraH, et al. Oblique wave scattering by a floating bridge in the presence of a vertical permeable flexible barrier. J Offshore Mech Arctic Eng2021; 143(2): 021701.
28.
Suresh KumarDGopikrishnan KasalaVAchaniD, et al. Wave-induced seepage force on a buried pipe in the presence of a floating structure. Proc IMechE, Part M: J Engineering for the Maritime Environment2022; 236(4): 877–890.
29.
SaghiHLakzianE.Optimization of the rectangular storage tanks for the sloshing phenomena based on the entropy generation minimization. Energy2017; 128: 564–574.
30.
SaghiHMikkolaTHirdarisS.The influence of obliquely perforated dual-baffles on sway induced tank sloshing dynamics. Proc IMechE, Part M: J Engineering for the Maritime Environment2021; 235(4): 905–920.
31.
KumaranVNeelamaniSVijayKG, et al. Wave attenuation by multiple slotted barriers with a zig-zag arrangement -a physical and numerical approach. J Hydro-Environ Res2022; 41: 25–37.
32.
AndrianovAIHermansAJ.The influence of water depth on the hydroelastic response of a very large floating platform. Mar Struct2003; 16(5): 355–371.
33.
MohapatraSCGhoshalRSahooT.Effect of compression on wave diffraction by a floating elastic plate. J Fluid Struct2013; 36: 124–135.
34.
LosadaIJLosadaMARoldánAJ.Propagation of oblique incident waves past rigid vertical thin barriers. Appl Ocean Res1992; 14(3): 191–199.
35.
LeeMMChwangAT.Scattering and radiation of water waves by permeable barriers. Phys Fluids2000; 12(1): 54–65.
