Ocean Systems Engineering

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Effects of a floating wave barrier with square cross section on the wave-induced forces exerted to an offshore jacket structure

  • Received : 2021.03.08
  • Accepted : 2021.09.03
  • Published : 2021.09.25
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Abstract

The main objective of the present research was investigating the effects of a floating wave barrier with square cross section installed in front of an offshore jacket structure on the wave height, base shear, and overturning moment. A jacket model with the height of 4.55 m was fabricated and tested in the 402 m-long wave flume of NIMALA marine laboratory. The jacket was tested at the water depth of 4m subjected to the random waves with a JONSWAP energy spectrum. Three input wave heights were chosen for the tests: 20 cm, 23 cm, and 28 cm. Results showed that the average decrease in the jacket's base shear due to the presence of a floating wave barrier with square cross section was 18.97%. The use of wave barriers with square cross section also resulted in 19.78% decrease in the jacket's overturning moment. Hence, it can be concluded that a floating wave barrier can significantly reduce the base shear and overturning moment in an offshore jacket structure.

Keywords

Acknowledgement

The authors would like to thank the technical staff of NIMALA marine laboratory specially Eng. Taghi Aliakbari and Eng. Seyyed Abolfazl Hashemi. The support from the Vice-chancellery for Research and Technology of Islamic Azad University-Maragheh Branch is also highly appreciated. Useful comments of anonymous reviewers on draft version of the paper are also highly appreciated.

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