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RESEARCH PAPERS: Offshore Mechanics

The Dynamics of Towed Arrays

[+] Author and Article Information
G. S. Triantafyllou, C. Chryssostomidis

Ocean Engineering Department, Massachusetts Institute of Technology, Cambridge, MA 02139

J. Offshore Mech. Arct. Eng 111(3), 208-213 (Aug 01, 1989) (6 pages) doi:10.1115/1.3257149 History: Received January 01, 1987; Revised October 07, 1988; Online October 30, 2009

Abstract

A procedure for calculating the response of an array to a harmonic excitation applied at the upstream end is presented. The fluid forces on the array are modeled following the slender-body approximation and the cross-flow principle. An equivalent linear damping is used to replace the quadratic drag due to cross-flow separation. The equivalent linear damping is determined using an iterative procedure. Numerical and asymptotic solutions are derived, and the response of a typical long array is calculated. It is found that, when the separation drag is included, the array exhibits the behavior of an over-damped system, responding only to low-frequency excitations.

Copyright © 1989 by ASME
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