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Wiley InterScience | |||||
  Naval Engineers JournalVolume 119 Issue 3, Pages 35 - 44 Published Online: 13 Dec 2007 © 2009 American Society of Naval Engineers
Abstract | References | Full Text: HTML, PDF (Size: 1603K) | Related Articles | Citation Tracking  TECHNICAL PAPER On the Parametric Resonance of Tumblehome Hullforms in a Longitudinal Seaway Copyright © 2007, American Society of Naval Engineers ABSTRACTThis work presents a numerical study of the influence of topside shape on parametric roll in longitudinal seas. The ONR 3 Topsides hulls are used to compare the single degree-of-freedom rolling response of a destroyer-sized vessel with flared (model 5613), tumblehome (model 5613-1), and wallsided (model 5613-2) shapes above the waterline. Through this relative comparison, the key aspects of parametric resonance of a tumblehome hullform are highlighted, namely the reduction in head seas forward speed required to encounter parametric roll. A variant on the Mathieu equation is used to simulate roll motions. | 
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