Analysis of wave attenuation and shore protection of a bulk carrier ship performing as a detached floating breakwater

作者：Fernandez Lazaro A; Gutierrez Serret R M; Negro V; Lopez Gutierrez J S

来源：Journal of Coastal Research, 2014, 70: 7-+.

DOI：10.2112/SI70-002.1

• Physical model tests
• irregular waves
• transmission coefficient
• reflection coefficient
• dissipation
• shore%26apos
• s response
• salient
• tombolo
• chain forces

The effectiveness of a bulk carrier working as a detached floating breakwater to protect a stretch of coast and form salients or tombolos is assessed in this paper. Experiments were conducted in the Madrid CEDEX facilities in a 30 m long, 3 m wide, 1/150 scale flume. The bulk carrier ship is 205 in long, 29 m wide and 18 m in height with a draught of 13 m, and has been subjected to irregular waves with significant heights from 2 m to 4 in and peak periods from 6 s to 12 s at a depth of 15 m, all prototype dimensions. Three probes were placed between the wave paddle and the ship to record incident and reflected waves and four probes were placed between the ship and the coastline to measure the transmitted waves. Transmission, reflection and dissipation coefficients (C-t, C-r, C-d) were calculated to determine wave attenuation. Results show good shelter in the lee of the ship with values of C-t under 0.5 for peak periods from 6 s to 11 s. In addition, forces on the mooring chains were measured showing maximum values of about 2000 tons at a 10 s peak period. Finally, two analytical models were used to determine the shoreline%26apos;s response to the ship%26apos;s protection and to assess the possible forming of salients or tombolos. According to the results, salients - but not tombolos - are formed in all tests.

• 出版日期2014-4