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Identification of influential parameters in a ship's motion responses: A route to monitoring dynamic stability
Citation
Enshaei, H and Birmingham, R and Mesbahi, E, Identification of influential parameters in a ship's motion responses: A route to monitoring dynamic stability, International Journal of Maritime Engineering, 154, (A1) pp. 43-52. ISSN 1740-0716 (2012) [Refereed Article]
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Copyright Statement
Copyright 2012 The Royal Institution of Naval Architects
DOI: doi:10.3940/rina.ijme.2012.a1.226
Abstract
Six degrees of freedom motion response tests of a Ro-Ro model have been carried out in irregular waves under intact conditions. A stationary model was tested in different sea states for following, astern quartering and beam seas. The investigation was limited to the effect of encountered frequency components and associated magnitude of energy of the ship's motion responses. Analysis of heave, pitch and roll motions confirmed the vulnerability of the model to certain frequency ranges resulting in an adverse effect on the responses, and these were closely related to its natural frequencies. It was confirmed that the roll motion maintains its highest oscillation around the natural frequency in all sea conditions regardless of heading angles. However spectral analysis of the heave and pitch responses revealed the wave peak frequency. Roll is magnified when the peak frequency of wave approaches the natural roll frequency; therefore keeping them apart avoids a large motion response. It was concluded that peak frequency and associated magnitude are two important inherent characteristics of motion responses. Detection of influential parameters of encountered wave through heave and pitch responses could be utilised to limit a large ship's motion at sea. © The Royal Institution of Naval Architects.
Item Details
Item Type: | Refereed Article |
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Keywords: | Ship motion |
Research Division: | Engineering |
Research Group: | Maritime engineering |
Research Field: | Naval architecture |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the environmental sciences |
UTAS Author: | Enshaei, H (Dr Hossein Enshaei) |
ID Code: | 93985 |
Year Published: | 2012 |
Web of Science® Times Cited: | 1 |
Deposited By: | Seafaring |
Deposited On: | 2014-08-25 |
Last Modified: | 2017-11-03 |
Downloads: | 4 View Download Statistics |
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