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RESEARCH PAPERS

Dynamic Response of a Double Articulated Offshore Loading Structure to Noncollinear Waves and Current

[+] Author and Article Information
R. K. Jain

Structures, Vickers Offshore (Projects and Developments) Ltd., Barrow-in Furness, England

C. L. Kirk

College of Aeronautics, Cranfield Institute of Technology, Cranfield, Bedford, England

J. Energy Resour. Technol 103(1), 41-47 (Mar 01, 1981) (7 pages) doi:10.1115/1.3230813 History: Received December 01, 1980; Online October 22, 2009

Abstract

The three-dimensional dynamic response of a double articulated offshore loading structure to noncollinear waves and a steady current is studied for various waves and varying current directions. The governing equations of motion are derived by the Lagrange’s method where the wave and current forces are computed by a modified form of the Morison’s equation which takes account for the relative motion of the water particles with respect to the oscillating structure. The resulting highly nonlinear equations are solved by using a block integration method. The computed results predict complex whirling oscillations of the structure to noncollinear waves and current.

Copyright © 1981 by ASME
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