Abstract
A finite element and boundary element model of the 100 m X-BOW polar exploration cruise ship is established. The vibrated velocity-excited force admittance matrix is calculated by frequency response analysis, and the vibrated velocity in the stern plate and main engine foundations is tested during the trial trip. Then, the excited force of the propeller and main engine is derived using the vibrated velocity and admittance matrix. Based on the excited force, the cabin-simulated vibrated velocity is compared with the tested vibrated velocity, and the tolerance is within the allowable scope in engineering. Loading the excited forces on the boundary element model, the distribution characteristics of sound level underwater are analyzed. Then, forces excited by the main engine and propeller are loaded on the model, and the contribution ratio of excitation sources to underwater acoustic radiation is analyzed. The result provides a reference for vibration assessment in the early stage and control in the late stage.
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Article Highlights
• Aiming at the problem that the empirical method is not applicable and the theoretical method is difficult to solve, the propeller and main engine excitation force inversion method, based on finite element model and real ship test data, is proposed. This method deduces a more accurate excitation source and provides a reference for calculating the excitation force of ship vibration sources.
• Based on the transfer path theory, the main excitation sources are selected and sorted according to the contribution rate of the excitation sources to underwater noise. This approach offers a reference method for controlling ship underwater noise.
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Jiang, G., Liu, Z., Liu, Y. et al. Contribution Ratio of Excitation Sources to the Underwater Acoustic Radiation of the X-BOW Polar Exploration Cruise Ship. J. Marine. Sci. Appl. (2024). https://doi.org/10.1007/s11804-024-00457-8
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DOI: https://doi.org/10.1007/s11804-024-00457-8