Extraction method of non-stationary ocean waves process based on variational mode decomposition

Yuanliang Wang; Yunliang Zheng; Xiangyu Xin; Yuchen Shang; Dong Wang; Lei Zhang; Jianing Zhang

doi:10.1117/12.2686126

28 July 2023 Extraction method of non-stationary ocean waves process based on variational mode decomposition

Yuanliang Wang, Yunliang Zheng, Xiangyu Xin, Yuchen Shang, Dong Wang, Lei Zhang, Jianing Zhang

Proceedings Volume 12756, 3rd International Conference on Applied Mathematics, Modelling, and Intelligent Computing (CAMMIC 2023); 127560K (2023) https://doi.org/10.1117/12.2686126
Event: 2023 3rd International Conference on Applied Mathematics, Modelling and Intelligent Computing (CAMMIC 2023), 2023, Tangshan, China

Abstract

In order to realize the research on the extraction of non-stationary process information of real ocean waves, a time frequency analysis method that based on variational modal decomposition (VMD) and Hilbert transform of measured ocean waves was proposed. The comparison of the measured waves and the waves obtained by the existing random wave model was analyzed by wavelet transform, which indicates that the wave spectrum model based on the Fourier transform cannot effectively reflect the non-stationary characteristics of the real waves. Furthermore, the non-stationary time frequency information obtained by the proposed method was used to reconstruct the wave surface, which was also verified by wavelet transform. Results show that the proposed method can be more accurate in reflecting the non-stationary information of the measured waves and can be more precise in restoring the real ocean waves.

Citation Download Citation

Yuanliang Wang, Yunliang Zheng, Xiangyu Xin, Yuchen Shang, Dong Wang, Lei Zhang, and Jianing Zhang "Extraction method of non-stationary ocean waves process based on variational mode decomposition", Proc. SPIE 12756, 3rd International Conference on Applied Mathematics, Modelling, and Intelligent Computing (CAMMIC 2023), 127560K (28 July 2023); https://doi.org/10.1117/12.2686126

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