Hegde, A.V.Kamath, K.Deepak, J.C.2026-02-052008Ocean Engineering, 2008, 35, 1, pp. 165-173298018https://doi.org/10.1016/j.oceaneng.2007.08.001https://idr.nitk.ac.in/handle/123456789/27779The paper presents the results from model scale experiments on the study of forces in the moorings of horizontally interlaced, multi-layered, moored floating pipe breakwaters. The studies are conducted with breakwater models having three layers subjected to waves of steepness H<inf>i</inf>/L (H<inf>i</inf> is the incident wave height and L the wavelength) varying from 0.0066 to 0.0464, relative width W/L (W is the width of breakwater) varying from 0.4 to 2.65, and relative spacing S/D (S is the spacing of pipes and D the diameter of pipe) of 2 and 4. The variation of measured normalized mooring forces on the seaward side and leeward side are analyzed by plotting non-dimensional graphs depicting f/?W2 (f is the force in the mooring per unit length of the breakwater, ? the weight density of sea water) as a function W/L for various values of H<inf>i</inf>/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in H<inf>i</inf>/L for d/W values ranging between 0.081 and 0.276. The experimental results also reveal that the forces in the seaward side mooring decrease as W/L increases, up to a value of W/L=1.3, and then increases with an increase in W/L. It is also observed that the wave attenuation characteristics of breakwater model with relative spacing of 4 is better than that of the model with relative spacing of 2. The maximum force in the seaward side mooring for model with S/D=4 is lower compared to that for the breakwater model with S/D=2. A multivariate non-linear regression analysis has been carried out for the data on mooring forces for the seaside and leeside. © 2007 Elsevier Ltd. All rights reserved.Density (specific gravity)MooringMultivariant analysisPipeRegression analysisWater wavesMooring forceMultivariate non-linear regression analysisWave heightFloating breakwatersbreakwaterexperimental studyfloating offshore structureforcemooring systemnumerical modelpipelinewater depthwave height