### Abstract

The 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_{i}/L (H_{i} 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/γW^{2} (f is the force in the mooring per unit length of the breakwater, γ the weight density of sea water) as a function W/L for various values of H_{i}/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in H_{i}/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.

Original language | English |
---|---|

Pages (from-to) | 165-173 |

Number of pages | 9 |

Journal | Ocean Engineering |

Volume | 35 |

Issue number | 1 |

DOIs | |

Publication status | Published - 01-01-2008 |

Externally published | Yes |

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### All Science Journal Classification (ASJC) codes

- Environmental Engineering
- Ocean Engineering

### Cite this

*Ocean Engineering*,

*35*(1), 165-173. https://doi.org/10.1016/j.oceaneng.2007.08.001

}

*Ocean Engineering*, vol. 35, no. 1, pp. 165-173. https://doi.org/10.1016/j.oceaneng.2007.08.001

**Mooring forces in horizontal interlaced moored floating pipe breakwater with three layers.** / Hegde, Arkal Vittal; Kamath, Kiran; Deepak, J. C.

Research output: Contribution to journal › Article

TY - JOUR

T1 - Mooring forces in horizontal interlaced moored floating pipe breakwater with three layers

AU - Hegde, Arkal Vittal

AU - Kamath, Kiran

AU - Deepak, J. C.

PY - 2008/1/1

Y1 - 2008/1/1

N2 - The 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 Hi/L (Hi 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/γW2 (f is the force in the mooring per unit length of the breakwater, γ the weight density of sea water) as a function W/L for various values of Hi/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in Hi/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.

AB - The 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 Hi/L (Hi 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/γW2 (f is the force in the mooring per unit length of the breakwater, γ the weight density of sea water) as a function W/L for various values of Hi/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in Hi/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.

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U2 - 10.1016/j.oceaneng.2007.08.001

DO - 10.1016/j.oceaneng.2007.08.001

M3 - Article

VL - 35

SP - 165

EP - 173

JO - Ocean Engineering

JF - Ocean Engineering

SN - 0029-8018

IS - 1

ER -