Original scientific paper
https://doi.org/10.21278/brod69102
COMPARISON STUDY OF EXPERIMENTS AND PREDICTIONS OF WAVE KINEMATICS FOR ROGUE WAVE
Hae Jin Choi
; Department of offshore business, Samsung Engineering Co. Ltd., Seoul, Republic of Korea
Seung Jae Lee
; Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University, Busan, Republic of Korea
Hyo Jae Jo
; Department of Naval Architecture and Ocean Systems Engineering, Korea Maritime and Ocean University, Busan, Republic of Korea
Gang Nam Lee
orcid.org/0000-0002-7816-9506
; Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan, Republic of Korea
Kwang Hyo Jung
orcid.org/0000-0002-8229-6655
; Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan, Republic of Korea
Abstract
To investigate the wave kinematics under the rogue wave crest, a series of experiments were performed in 2-D wave tank with the application of PIV technique to measure the velocities under the free surface. Three different prediction methods of linear extrapolation, Wheeler stretching, and modified stretching were applied to estimate water wave kinematics and compared with PIV experimental results under the highest wave crest of irregular wave trains satisfying with rogue wave criteria. Also, the cut-off frequency dependence for three prediction methods was investigated with varying spectral peak frequencies to estimate wave kinematics including velocities and accelerations in horizontal and vertical directions. It was suggested that the cut-off frequency for the reasonable prediction of the wave kinematics under the rogue wave crest could be chosen three times of spectral peak wave frequency for the linear extrapolation and higher frequency than four times of spectral peak wave frequency for Wheeler stretching and modified stretching method.
Keywords
To investigate the wave kinematics under the rogue wave crest; a series of experiments were performed in 2-D wave tank with the application of PIV technique to measure the velocities under the free surface. Three different prediction methods of linear extrapolation; Wheeler stretching; and modified stretching were applied to estimate water wave kinematics and compared with PIV experimental results under the highest wave crest of irregular wave trains satisfying with rogue wave criteria. Also; the cut-off frequency dependence for three prediction methods was investigated with varying spectral peak frequencies to estimate wave kinematics including velocities and accelerations in horizontal and vertical directions. It was suggested that the cut-off frequency for the reasonable prediction of the wave kinematics under the rogue wave crest could be chosen three times of spectral peak wave frequency for the linear extrapolation and higher frequency than four times of spectral peak wave frequency for Wheeler stretching and modified stretching method
Hrčak ID:
187316
URI
Publication date:
31.3.2018.
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