Numerical investigation of T-Foil hybrid control strategy for ship motion reduction in head seas

Jiang, Yichen; Bai, Junyu; Sun, Yuan; Sun, Yue; Zong, Zhi

doi:10.1016/j.oceaneng.2020.107924

Cited by 8 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The trend in the heave motion reduction due to T-foil and speed align with previous studies, 9,53 but the present study is the first to quantify the RCS effectiveness, and the influences of the heading and speed on MSI based on full-scale sea trials investigation. These values provide a sound reference for comparison in future studies of the RCS effectiveness on WPCs.…”

Section: Resultssupporting

confidence: 87%

“…Considering that roll motion is the dominant response when the vessel encounters waves from the bow quarter, it is not unexpected to find the effectiveness of the Tfoil in oblique seas is not as significant as in head-seas. The trend in the heave motion reduction due to T-foil and speed align with previous studies 9,53 , but the present study is the first to quantify the RCS effectiveness, and the influences of the heading and speed on MSI based on full-scale sea trials investigation. These values provide a sound reference for comparison in future studies of the RCS effectiveness on WPCs.…”

Section: Motion Sickness Incidence At Different Headingssupporting

confidence: 88%

“…[1][2][3] To determine the operability or seaworthiness of a vessel, it is important to understand its motion while encountering waves. The most common indicator of the vessel motion is the Response Amplitude Operator (RAO), which can represent the motion response under various wave frequencies, [4][5][6][7][8][9][10][11][12] though the response is somewhat non-linear to the encountered waves. [13][14][15][16] Moreover, to compare the vessel motion response and further quantify passenger comfort, Motion Sickness Incidence (MSI) is analysed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Influence of an active T-foil on motions and passenger comfort of a wave-piercing catamaran based on sea trials in oblique seas

Lau

Ali-Lavroff

Holloway

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part M:

View full text Add to dashboard Cite

In this paper the influence of a Ride-Control System (RCS) on the Response Amplitude Operator (RAO) of a full-scale high-speed catamaran was investigated using sea trials data. A T-foil and stern tabs were installed on a Wave-Piercing Catamaran (Incat Tasmania Hull 061) to improve ship motions and passenger comfort. More than 40 total effective hours of sea trials were conducted by the US Navy in 2004, encountering sea states 4–5 in the Atlantic Ocean near the United Kingdom. The reduction in Motion Sickness Incidence (MSI) was estimated in order to examine the effectiveness of the RCS in improving passenger comfort. By comparing the case of active RCS (T-foil plus stern tabs) with the case of active stern tabs only, it was found that the T-foil plays a vital role in the passenger comfort enhancement. Based on ISO recommended MSI calculation of a 2-h seaway, the percentage reduction in MSI was estimated, and hence the effectiveness of the T-foil deployment, along with the influence of speeds, headings, location on board and encountered wave height were analysed. A notable improvement in passenger comfort was observed in the real world bow quartering sea by deploying the RCS. An MSI reduction of 21% in high speeds (30–35 knots, [Formula: see text] 0.6) was observed, which was almost twice the MSI reduction (11%) in low speeds (15–20 knots, [Formula: see text] 0.3). However, in terms of MSI percentage reduction, the ability of T-foil in vessel motion control in oblique seas was found to be limited compared to the results in head seas.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Motion Sickness Incidence At Different Headingssupporting

confidence: 88%