Wave Field Behind a Double-Submerged Breakwater

Akinori Yoshida, Shuguang Yan, Masaru Yamashiro, Isao Irie

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

To find more desirable wave field behind a submerged breakwater in terms of wave interception, mean water level change, wave profile, and so on, and to cope with the construction cost of the submerged breakwater which increases quadratically as the water depth increases, we considered that a double-submerged breakwater, which is a pair of two small submerged breakwaters located some distance apart, might be one solution. In order to study the wave field behind the double submerged breakwaters, we conducted wave tank experiments using random waves of several significant waves. Water surface oscillation and fluid velocity at the bottom were measured. Spatial changes of wave amplitude spectra, flow velocity spectra, mean water level change, skewness and atiltness of the wave profile of the water surface and the bottom velocity oscillations were calculated. Single-submerged breakwaters were also used in the experiment for comparison. It is found that the single submerged breakwater has better wave interception, while the double-submerged breakwater has less mean water level change, less steady flow velocity, and less asymmetry wave profile of flow velocity at the bottom. It is also found that very low frequency oscillation arises in surface waves and flow velocity at the bottom, only for the single-submerged breakwaters.

Original languageEnglish
Title of host publicationProceedings of the 12th (2002) International Offshore and Polar Engineering Conference
EditorsJ.S. Chung, M. Sayed, M. Kashiwagi, T. Setoguchi, S.W. Hong
Pages785-790
Number of pages6
Volume12
Publication statusPublished - 2002
EventProceedings of the Twelfth (2002) International Offshore and Polar Engineering Conference - Kitakyushu, Japan
Duration: May 26 2002May 31 2002

Other

OtherProceedings of the Twelfth (2002) International Offshore and Polar Engineering Conference
CountryJapan
CityKitakyushu
Period5/26/025/31/02

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All Science Journal Classification (ASJC) codes

  • Ocean Engineering

Cite this

Yoshida, A., Yan, S., Yamashiro, M., & Irie, I. (2002). Wave Field Behind a Double-Submerged Breakwater. In J. S. Chung, M. Sayed, M. Kashiwagi, T. Setoguchi, & S. W. Hong (Eds.), Proceedings of the 12th (2002) International Offshore and Polar Engineering Conference (Vol. 12, pp. 785-790)