Behavior of the residual wave components in a 3D wave basin after the termination of the wave maker

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Proceedings titleASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering: May 31-June 5, 2015, St. John's, Newfoundland, Canada
ConferenceASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2015, 31 May 2015 through 5 June 2015
Article numberOMAE201541850
SubjectArctic engineering; Damping; Natural frequencies; Ocean engineering; Tanks (containers); Data comparisons; Mono; Natural energy; Physical experiments; Residual undulation over time; Arctic vehicles
AbstractAfter the termination of the wave making, the characteristics of the existing wave components in a 3D large scale Offshore Engineering wave Basin (OEB) at the National Research Council of Canada have been investigated experimentally. In the generation of any wave in the tank we get the relevant primary wave components along with bounded wave components if the incident primary wave has more than one frequency. Inevitably we also get interacted wave components, natural frequency components of the tank and other free waves. In this paper the tank's natural frequency components, bounded wave components and other free waves after the termination of wave making were investigated using several cases of mono- and bi-chromatic waves. These component energies were then compared with the total energy of the measured primary waves. The magnitudes of the residual undulations are also investigated for mono-, bi- and multichromatic waves over different time segments. Several sets of wave data are analysed to perceive the energy due to natural frequency of the basin, energy transferred to the side bands and the damping rate of the residual waves in the tank with respect to the chosen incident wave conditions. In the analysis it is observed that the energy damping rate varies with the incident wave condition but seems much faster than that of 20 minutes traditional waiting time in between two runs in the OEB. The energies for tank's natural frequency components and other free waves were found to be very small compare to the incident primary wave energies.
Publication date
PublisherAmerican Society of Mechanical Engineers
AffiliationNational Research Council Canada (NRC-CNRC); Ocean, Coastal and River Engineering
Peer reviewedYes
NRC numberOCRE-PR-2015-001
NPARC number21277413
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Record identifier8f7449bf-b80b-4567-a5b1-ab5f61239974
Record created2016-03-09
Record modified2016-05-09
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