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http://dx.doi.org/10.3744/JNAOE.2011.3.2.150

Peak mooring forces in the horizontal interlaced multi-layered moored floating pipe breakwater  

Mane, Vishwanath (Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka)
Rajappa, Sacchi (Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka)
Rao, Subba (Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka)
Vittal, Hegde A. (Department of Applied Mechanics and Hydraulics, National Institute of Technology Karnataka)
Publication Information
International Journal of Naval Architecture and Ocean Engineering / v.3, no.2, 2011 , pp. 150-158 More about this Journal
Abstract
Present study aims to investigate the influence of relative breakwater width W/L (W=width of breakwater, L=wavelength), wave steepness $H_i/gT^2$ (Hi=incident wave height, T=wave period) and relative wave height d/W (d=water depth) on forces in the moorings of horizontal interlaced multi-layered moored floating pipe breakwater (HIMMFPB) model. Studies were conducted on scaled down physical models having three layers of Poly Vinyl Chloride (PVC) pipes, wave steepness $H_i/gT^2$ varying from 0.063 to 0.849, relative width W/L varying from 0.4 to 2.65 and relative spacing S/D=2 (S=horizontal centre-to-centre spacing of pipes, D=diameter of pipes). Peak mooring forces were also measured and data collected is analyzed by plotting non-dimensional graphs depicting variation of $f_s/{\gamma}W^2$ ($f_s$=Sea side Mooring force, ${\gamma}$=specific weight of water) & $f_l/{\gamma}W^2$ ($f_l$=Lee side Mooring force) with $H_i/gT^2$ for d/W varying from 0.082 to 0.276 and also variation of $f_s/{\gamma}W^2$ and $f_l/{\gamma}W^2$ with W/L for $H_i$/d varying from 0.06 to 0.400.
Keywords
Mooring forces; Wave steepness; Relative breakwater width; Ratio of spacing to diameter of pipes; Relative wave height;
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