An investigation on the vertical motion sickness characteristics of a high-speed catamaran ferry

Fang, Chih-Chung; Chan, Hoi-Sang

doi:10.1016/j.oceaneng.2007.04.001

Cited by 36 publications

(25 citation statements)

References 8 publications

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“…This paper reports on an investigation into the effect of the centre bow design and tunnel clearance on the severity of slamming loads and pressures acting on a Wave Piercing Catamaran (WPC) as shown in Figure 1. Improving the seakeeping performance of high speed catamaran ferries was one of the earliest development stages of these vessels [1][2][3][4]. For WPC vessels, the role of centre bow is to provide reserve buoyancy in the forward area [5,6] where the demi-hulls are extremely slender to restrict pitch motions in extreme pitch-in scenarios.…”

Section: Introductionmentioning

confidence: 99%

Wet-deck slamming loads and pressures acting on wave piercing catamarans

Shabani

Lavroff

Holloway

et al. 2019

ISP

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BACKGROUND: The wet-deck height and centre bow configuration in wave piercing catamarans are critical design factors which influence slamming occurrence and severity. OBJECTIVE: In this paper, the wet-deck slamming loads and pressures acting on a 112 m catamaran with a centre bow were investigated in regular waves in two wave heights. METHODS: A 2.5 m hydroelastic model with three alternate configurations of wet-deck vertical clearance was tested at a speed of 2.89 m/s (38 knots full-scale equivalent). RESULTS: The results showed that at the instant of slamming the centre bow immersion depth relative to the undisturbed incident wave elevation was less than two thirds of the maximum immersion depth during the wet-deck slam event. The location of maximum slamming pressure was found to be in the range between 77% and 80% of the overall length from the transom. The relationship between the relative velocity at impact and slamming force indicated that slamming loads in the order of the vessel weight can occur for the parent design when the relative velocity at slam is about a quarter of the forward speed. CONCLUSIONS: Overall, increasing the wet-deck height was more beneficial for reduction of slamming loads and pressures in smaller waves than in large waves.

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Section: Introductionmentioning

confidence: 99%

Wet-deck slamming loads and pressures acting on wave piercing catamarans

Shabani

Lavroff

Holloway

et al. 2019

ISP

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“…When the trimaran navigates under high speed, the longitudinal motion responses may be large. The vertical acceleration will cause severe seasickness of passengers and crew [13]. In order to reduce longitudinal motion responses of fast ferries, different kinds of motion control devices have been developed to increase comfort of passengers.…”

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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“…gathered records of motion sickness occurrences from the behavior of 20,029 passengers and motion on 9 different vessels surveyed on 114 voyages to help in such study [5]. Recent attempts vary from investigation of different passenger vessels performance like Chih-Chung Fang's attempts on a high-speed catamaran ferry [6] Tezgodan's et. al.…”

Section: Introductionmentioning

confidence: 99%

Buoyancy Boxes (Sponsons) Effects on Sea Keeping Qualities of Roro/Pax Ships

Welaya¹,

Kotb²,

Hassan³

2016

The International Conference on Applied Mechanics and Mechanica

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A ship sea keeping quality is usually adjudged in regards to many parameters like vessel motions thus affect passengers comfort or cargo safety. In this paper, a numerical analysis for on Motion sickness incidence and vertical acceleration levels. The analysis shows that in different Sea states, the sponsons seems to have a positive effect in reducing motion sickness as well as for the vertical acceleration, although this advantage seems to have minor effects but could prove useful as a step towards more comfort and healthy seagoing ship.

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An investigation on the vertical motion sickness characteristics of a high-speed catamaran ferry

Cited by 36 publications

References 8 publications

Wet-deck slamming loads and pressures acting on wave piercing catamarans

Wet-deck slamming loads and pressures acting on wave piercing catamarans

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

Buoyancy Boxes (Sponsons) Effects on Sea Keeping Qualities of Roro/Pax Ships

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