Experimental study of controlled T-foil for vertical acceleration reduction of a trimaran

Zong, Zhi; Sun, Yue; Jiang, Yichen

doi:10.1007/s00773-018-0576-9

Cited by 23 publications

(15 citation statements)

References 9 publications

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“…To reflect the coupled heave and pitch motions intuitively, the nonlinear mathematical model of the studied catamaran can be linearized 24 :…”

Section: Mathematical Model Of the Catamaranmentioning

confidence: 99%

“…Their results indicated that a catamaran with fixed hydrofoils has good seakeeping performance. Zong et al 24,25 used a T-foil with a controller to reduce the heave and pitch motions of a trimaran vessel. Their results showed that an actively controlled T-foil reduced the heave and pitch motions by about 20% more than a fixed T-foil in regular waves.…”

Section: Introductionmentioning

confidence: 99%

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Experimental and numerical investigation on control strategies for heave and pitch motion reduction of a catamaran

Zheng

Liu

Guo-sheng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part M:

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In this study, simulations and experiments were conducted on reducing the heave and pitch motions of a catamaran. To serve as stability appendages, an actively controlled T-foil and flap were designed, including their dimensions and installation position on the catamaran. Based on the uncoupled analysis of the appendages, the following control strategies were adopted: the previously proposed resultant force and moment distribution with feedback by displacement (RFMD-D) and the newly developed resultant force and moment distribution with feedback by velocity (RFMD-V). These two control strategies were applied to an S-plane controller, and their performances were tested in simulations and experiments. Finally, a bare catamaran and catamaran with actively controlled appendages were towed in a towing tank, and the two control strategies were tested. The results showed that both control strategies are effective and that RFMD-V is more effective than RFMD-D.

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“…To reflect the coupled heave and pitch motions intuitively, the nonlinear mathematical model of the studied catamaran can be linearized 24 :…”

Section: Mathematical Model Of the Catamaranmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and numerical investigation on control strategies for heave and pitch motion reduction of a catamaran

Zheng

Liu

Guo-sheng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part M:

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show abstract

“…Hebblewhite et al [6] and Duan et al [7,8] investigated the effects of the stagger of the side hulls on the motions of a trimaran hull and pointed out that a trimaran's seakeeping performance can be improved by properly designing the outrigger layout. Since trimaran suffers a relatively large motion response when navigating under high speed, Zong et al [9] introduced a fore-outrigger hull form trimaran and carried on ship model experiments including a bare hull and a hull with T-foil to investigate the anti-pitching effect of the T-foil.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on hydrodynamic coefficients and longitudinal motions of trimaran in head seas for various wave slopes

Zhang

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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In this study, numerical simulations for the prediction of hydrodynamic coefficients and longitudinal motions of a trimaran vehicle in regular head waves with varying wave slopes are presented for a wide range of wave conditions. Wave excitation and radiation terms in 2DOF equations of longitudinal motions of the ship in regular head seas are obtained, using an unsteady Reynolds averaged Navier-Stokes (URANS) solver based on finite volume method. A trimaran hull form is used for the calculations at a relative high Froude number of 0.628. Numerical simulations are performed for eight different regular wave conditions with varying wave slopes. Firstly, the verification study is performed to determine an optimal mesh system and time step for CFD simulations. Secondly, numerical simulations are carried out to predict hydrodynamic coefficients and longitudinal motion responses and the results are compared with those obtained from the fully URANS approach and experiments. Finally, the relationship between the hydrodynamic coefficients and longitudinal motions are investigated with varying wave slopes. Systematic studies of the numerical simulations demonstrate that the numerical results have a reasonable agreement with the experimental data. The nonlinearities effects of wave slopes on the hydrodynamic coefficients and vertical motion of the trimaran are studied and analyzed taking the viscous effect and free surface nonlinearities into consideration.

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“…The authors pointed out that the vertical acceleration and MSI (Motion Sickness Index) of the fast ferry were reduced by 65 and 35% , respectively , with the actuators moving under control. In [17] an experimental study (model tests) was conducted on a trimaran with controlled T-foil, three different ship models including a bare hull, a hull with non-controlled T-foil and a hull with an active controlled T-foil. In the study, the efficacy of the non-controlled and controlled T-foil were reported and discussed.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

2019

Polish Maritime Research

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The longitudinal motion characteristics of a slender trimaran equipped with and without a T-foil near the bow are investigated by experimental and numerical methods. Computational fluid dynamics ( CFD) method is used in this study. The seakeeping characteristics such as heave, pitch and vertical acceleration in head regular waves are analyzed in various wave conditions. Numerical simulations have been validated by comparisons with experimental tests. The influence of large wave amplitudes and size of T-foil on the longitudinal motion of trimaran are analyzed. The present systematic study demonstrates that the numerical results are in a reasonable agreement with the experimental data. The research implied that the longitudinal motion response values are greatly reduced with the use of T-foil.

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Experimental study of controlled T-foil for vertical acceleration reduction of a trimaran

Cited by 23 publications

References 9 publications

Experimental and numerical investigation on control strategies for heave and pitch motion reduction of a catamaran

Experimental and numerical investigation on control strategies for heave and pitch motion reduction of a catamaran

Numerical study on hydrodynamic coefficients and longitudinal motions of trimaran in head seas for various wave slopes

Numerical and Experimental Study on Seakeeping Performance of a High-Speed Trimaran with T-foil in Head Waves

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