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Effects of vertical motions on roll of planing hulls

Citation

Tavakoli, S and Dashtimanesh, A and Mancini, S and Mehr, JA and Milanesi, S, Effects of vertical motions on roll of planing hulls, Journal of Offshore Mechanics and Arctic Engineering, 143, (4) pp. 041401-1-041401-10. ISSN 0892-7219 (2021) [Refereed Article]

Copyright Statement

Copyright 2021 by ASME

DOI: doi:10.1115/1.4050210

Abstract

Roll motion of a planing hull can be easily triggered at high speeds, causing a significant change in hydrodynamic pressure pattern, which can threaten the stability of the vessel. Modeling and investigating roll motion of a planing vessel may require a strong coupling between motions in vertical and transverse planes. In the present paper, we have used a mathematical model to analyze the roll of a planing hull by coupling surge, heave, pitch, and roll motions using 2D+T theory to study the effects of roll-induced vertical motions on roll coefficients and response. Mathematically computed forces and moments as well as roll dynamic response of the vessel are seen to be in fair quantitative agreement with experimentally measured values of previously published data. Using the 2D+T method, it has been shown that to model the roll of a planing hull at high speeds, we need to consider the effects of heave, pitch, and surge motions. Through our mathematical modeling, it is found that freedom in vertical motions increases time-dependent roll damping and added mass coefficients, especially at early planing speeds. The results of dynamic response simulations suggest that freedom in the vertical plane can decrease the roll response.

Item Details

Item Type:Refereed Article
Keywords:planing hulls, roll motion, vertical motions
Research Division:Engineering
Research Group:Maritime engineering
Research Field:Naval architecture
Objective Division:Transport
Objective Group:Water transport
Objective Field:Water transport not elsewhere classified
UTAS Author:Mehr, JA (Dr Javad Mehr)
ID Code:143065
Year Published:2021
Deposited By:NC Maritime Engineering and Hydrodynamics
Deposited On:2021-02-24
Last Modified:2021-11-22
Downloads:0

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