Table of Contents
ISRN Mechanical Engineering
Volume 2012 (2012), Article ID 127238, 19 pages
http://dx.doi.org/10.5402/2012/127238
Research Article

On Vibration and Noise Dissipation in Ship and FPSO Structures with Smart Systems

1Department of Systems Engineering, Faculty of Engineering, University of Lagos, Akoka-Yaba, Lagos 23401, Nigeria
2Centre for Space Transport and Propulsion, National Space Research and Development Agency, Federal Ministry of Science and Technology FCT, Abuja, PMB 437, Nigeria

Received 10 January 2012; Accepted 12 March 2012

Academic Editors: C. F. Gao, R. Ohayon, and G.-J. Wang

Copyright © 2012 Vincent O. S. Olunloyo and Charles A. Osheku. 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.

Abstract

Ships and floating structure production systems are widely deployed for deep and ultradeep waters operation. Active vibration reduction and noise control in such structures can significantly improve their hydrodynamic performance and stability during navigation, exploration, and exploitation activities. One way to minimise or reduce the transmission of vibration in these moving offshore structures is to exploit the mechanism of interfacial slip in press fit joints or layered structural laminates in their internal hull configurations to dissipate vibration energy. In this paper, slip damping with heterogeneous sandwich composite viscoelastic beam-plate smart systems as a model for dissipation of vibration and active noise control mechanism in ship and floating structures is investigated. For this problem, a boundary value partial differential equation is formulated for the case of linear and nonlinear hydrodynamic wave loadings. In particular, the effect of pressure distribution variation at the interface of the layered smart system on the energy dissipation, logarithmic damping decrement, and spatial transfer function is analyzed and presented for design application and selection of appropriate stabilizers.