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Appl. Sci. 2018, 8(11), 2327; https://doi.org/10.3390/app8112327

Investigation on Ship Hydroelastic Vibrational Responses in Waves

1
College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
2
Department of Civil, Environmental & Ocean Engineering, Stevens Institute of Technology, Hoboken, NJ 07030, USA
3
School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
*
Author to whom correspondence should be addressed.
Received: 19 October 2018 / Revised: 14 November 2018 / Accepted: 16 November 2018 / Published: 21 November 2018
(This article belongs to the Section Acoustics and Vibrations)

Abstract

The hydroelastic vibrational responses of a large ship sailing in regular and irregular head waves are investigated numerically and experimentally. A 3D time-domain nonlinear hydroelastic mathematical model is established in which the hydrostatic restoring forces and incident wave forces are calculated on the instantaneous wetted hull surface to consider nonlinear effects of the rigid motion and elastic deformation of the hull in harsh waves. Radiation and diffraction wave forces are computed on the mean wetted surface based on the 3D frequency-domain potential flow theory. The slamming loads are calculated by momentum theory and integrated into the hydrodynamic forces. The 1D Timoshenko beam theory is adopted to model the vibrational structural response and is fully coupled with the presented hydrodynamic theory in time-domain to generate the hydroelastic equation of motion. Moreover, self-propelled segmented model tests were conducted in a laboratory wave tank to experimentally investigate the hydroelastic responses of a target ship in regular and irregular head seas. The numerical and experimental results are systemically compared and analyzed, and the established hydroelastic analysis model turns out to be reliable and effective in the prediction of ship hydroelastic responses in waves. View Full-Text
Keywords: ship hydroelasticity theory; wave loads; slamming loads; segmented model test; irregular waves ship hydroelasticity theory; wave loads; slamming loads; segmented model test; irregular waves
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Yu, H.; Xia, Y.; Jiao, J.; Ren, H. Investigation on Ship Hydroelastic Vibrational Responses in Waves. Appl. Sci. 2018, 8, 2327.

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