TY - GEN
T1 - WHAT A WAVE BUOY ACTUALLY MEASURES IN 3D
T2 - ASME 2023 42nd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2023
AU - Ding, Yue
AU - Taylor, Paul H.
AU - Dory, Jean Noel
AU - Zhao, Wenhua
N1 - Publisher Copyright:
© 2023 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 2023
Y1 - 2023
N2 - Measurements of surface waves from oceanographic buoys have been regarded as the ‘ground truth’ for validation of sea-state prediction models, providing the basis for input to the design of offshore structures. The engineering practice is to produce wave statistics of vertical surface displacements over periods of years. However, a wave buoy can provide simultaneous time histories of its motion, one vertically and other two horizontally, giving the complete vector displacement field in time. We investigate the measured time histories of a wave buoy in three orthogonal directions, and explore the relationship between them, for a relatively benign, so typical, sea state. We adopt a NewWave-type analysis to investigate the average shape of the large events across the measured time histories. In combination with a conditioning analysis, we give a reciprocity relationship between the vertical displacement of the wave buoy and those in the horizontal plane. The relationship is of value, as it allows for the prediction of wave kinematics in the horizontal plane based on the vertical measurement only. We observe significant second-order components in the measured data in the horizontal directions and smaller contributions vertically. This data-driven analysis paves the way for wave-by-wave prediction and the active control of wave energy converters and floating wind turbines in engineering practice.
AB - Measurements of surface waves from oceanographic buoys have been regarded as the ‘ground truth’ for validation of sea-state prediction models, providing the basis for input to the design of offshore structures. The engineering practice is to produce wave statistics of vertical surface displacements over periods of years. However, a wave buoy can provide simultaneous time histories of its motion, one vertically and other two horizontally, giving the complete vector displacement field in time. We investigate the measured time histories of a wave buoy in three orthogonal directions, and explore the relationship between them, for a relatively benign, so typical, sea state. We adopt a NewWave-type analysis to investigate the average shape of the large events across the measured time histories. In combination with a conditioning analysis, we give a reciprocity relationship between the vertical displacement of the wave buoy and those in the horizontal plane. The relationship is of value, as it allows for the prediction of wave kinematics in the horizontal plane based on the vertical measurement only. We observe significant second-order components in the measured data in the horizontal directions and smaller contributions vertically. This data-driven analysis paves the way for wave-by-wave prediction and the active control of wave energy converters and floating wind turbines in engineering practice.
KW - data analysis
KW - full scale measurement
KW - NewWave
KW - Nonlinearity
KW - Oceanographic wave-buoy
KW - wave directional spreading
UR - http://www.scopus.com/inward/record.url?scp=85173578854&partnerID=8YFLogxK
U2 - 10.1115/OMAE2023-104281
DO - 10.1115/OMAE2023-104281
M3 - Conference proceedings published in a book
AN - SCOPUS:85173578854
T3 - Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
BT - Ocean Engineering
PB - American Society of Mechanical Engineers (ASME)
Y2 - 11 June 2023 through 16 June 2023
ER -
