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Shock and Vibration
Volume 2018, Article ID 7054768, 17 pages
Research Article

On the Nonlinear Vibrational Responses of a Large Vessel with a Broad Bow Flare under Wave Excitation: Theory and Experiment

1College of Shipbuilding Engineering, Harbin Engineering University, Harbin 150001, China
2Department of Offshore Engineering, China Classification Society, Tianjin Branch, Tianjin 300457, China
3Department of Civil and Environmental Engineering, University of California, Berkeley, Berkeley, CA 94720, USA

Correspondence should be addressed to Huilong Ren; ten.362@gnoliuhner

Received 27 July 2017; Revised 28 October 2017; Accepted 12 December 2017; Published 27 February 2018

Academic Editor: Juan C. G. Prada

Copyright © 2018 Haicheng Yu et al. 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.


A fully coupled nonlinear three-dimensional (3D) hydroelastic method is developed to investigate vibrational responses of a large ship with a pronounced bow flare subjected to high seas. This numerical model consists of a 3D boundary element method, 1D Euler-Bernoulli beam model, and a 2D generalized Wagner model. Green water loads were considered. Experimental study was carried out in a towing tank on a self-propelled segmented model with nonuniform steel backbones. The ship model was tested in regular incident waves of large amplitude. Impact pressure and nonlinear vertical bending moments were measured and compared with numerical predictions. The proposed nonlinear model produced similar results to the experimental model. Furthermore, the effects of elastic modes and nonlinearities on the numerical results were analyzed.