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Ocean Systems Engineering
  Volume 12, Number 4, December25 2022 , pages 439-459

Experimental studies of impact pressure on a vertical cylinder subjected to depth induced wave breaking
Vipin Chakkurunnipalliyalil, Panneer Selvam Rajamanickam and Sannasiraj Annamalaisamy Sannasiraj

    This paper describes experimental studies of impact pressure generated by breaking regular waves in shallow water on a vertical cylinder. Experimental work was carried out in a shallow water flume using a 1:30 - scale model of a vertical rigid circular hollow cylinder with a diameter 0.2 m. This represents a monopile for shallow water offshore wind turbines, subjected to depth induced breaking regular waves of frequencies of 0.8 Hz. The experimental setup included a 1 in 10 sloping bed followed by horizontal bed with a constant 0.8 m water depth. To determine the breaking characteristics, plunging breaking waves were generated. Free surface elevations were recorded at different locations between the wave paddle to the cylinder. Wave impact pressures on the cylinder at a number of elevations along its height were measured under breaking regular waves. The depth-induced wave breaking characteristics, impact pressures, and wave run-up during impact for various cylinder locations are presented and discussed.
Key Words
    breaking characteristics; depth induced wave breaking; impact pressure; monopile substructure; wave runup
Vipin Chakkurunnipalliyalil, Panneer Selvam Rajamanickam and Sannasiraj Annamalaisamy Sannasiraj: Department of Ocean Engineering, IIT Madras, Chennai, India

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