✦ LIBER ✦

Dynamics of a moored barge under periodic and randomly disturbed excitation

✍ Scribed by Katrin Ellermann

Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 441 KB
Volume: 32
Category: Article
ISSN: 0029-8018
DOI: 10.1016/j.oceaneng.2004.11.004

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✦ Synopsis

Offshore systems often exhibit distinctly nonlinear phenomena. Even when excited periodically by waves, they show responses ranging from harmonic or subharmonic to chaotic motion. Depending on the system's parameters, these different types of responses can be coexisting, which makes the initial conditions crucial for the steady state response. Here, the case of a moored barge is considered. The excitation is assumed to have a periodic component and an additive disturbance modelled as white noise. The response of this system, which shows multiple attractors for purely periodic forcing, reveals some similarities but also fundamental differences for the disturbed forcing.

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