General information
High speed ships operating in waves are prone to high accelerations due to slamming in bow seas and may loose course control (broaching) in stern quartering seas. This compromises the wellness (motion sickness) and safety of passenges and crew. In order to avoid or delay these effects to higher sea states, ride control systems can be used. Such systems generate hydrodynamic forces at high speed which are used to control ship motions. Ride control systems include anti-roll fins, T-foils, trim flaps and interceptors.
Foil-assisted craft offer besides ride control also a resistance reduction by lifting the hull fully (hydrofoils) or partially above the water surface.
High speed ships operating in waves are prone to high accelerations due to slamming in bow seas and may loose course control (broaching) in stern quartering seas. This compromises the wellness (motion sickness) and safety of passenges and crew. In order to avoid or delay these effects to higher sea states, ride control systems can be used. Such systems generate hydrodynamic forces at high speed which are used to control ship motions. Ride control systems include anti-roll fins, T-foils, trim flaps and interceptors.
Foil-assisted craft offer besides ride control also a resistance reduction by lifting the hull fully (hydrofoils) or partially above the water surface.
Services & Activities
The Manoeuvring & Seakeeping Department performs investigations in to the efficiency of ride control systems on a regular basis. A suite of computer programs is available to investigate the effects of alternative ride control systems in an early design stage. The increase in passenger comfort and operability can be expressed in earning capacity of the ship.
To verify predictions, scale model tests are performed whereby the actual control system used on the prototype can be connected to the model. For these kind of model test state of the art actuation mechanisms and digital control are available at MARIN.
The effects of control and foil systems on resistance and powering are addressed by the knowledge group resistance and propulsion, while the knowledge groups manouevring may be involved in manoeuvring.
The Manoeuvring & Seakeeping Department performs investigations in to the efficiency of ride control systems on a regular basis. A suite of computer programs is available to investigate the effects of alternative ride control systems in an early design stage. The increase in passenger comfort and operability can be expressed in earning capacity of the ship.
To verify predictions, scale model tests are performed whereby the actual control system used on the prototype can be connected to the model. For these kind of model test state of the art actuation mechanisms and digital control are available at MARIN.
The effects of control and foil systems on resistance and powering are addressed by the knowledge group resistance and propulsion, while the knowledge groups manouevring may be involved in manoeuvring.
Facilities & Tools
Ride control systems and Foil assist craft are tested in the following MARIN facilities:
Ride control systems and Foil assist craft are tested in the following MARIN facilities:
- Deep Water Towing Tank: Resistance and propulsion tests, Captive manoeuvring tests / PMM-tests, initial steering tests
- Seakeeping & Manoeuvring Basin: seakeeping and manoeuvring tests
- High-speed Basin: tests at high froude numbers (ahead and astern wave conditions possible)
The FREDYN and PANSHIP tools are used to estimate the behaviour of the Ride control and foil assist vessels. More information on these tools s given here.
Experience
The list below gives a review of Ride control systems and Foil assist craft carried out at MARIN:
The list below gives a review of Ride control systems and Foil assist craft carried out at MARIN:
- CHSV: development and testing of ride control system for advanced high speed vessel with blended-wing-bodies, 2004-2005
- HSF-ARCOS: development and testing of advanced ride control system for high speed ferry, 2001-2002
- Numerous model test projects for a variety of ships with a variety of ride control types such as anti-roll fins, active trim flaps, interceptors and controllable T-foils
Most recent Ride control systems and Foil assist craft papers presented by MARIN:
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Computational Predictions vs. Model Testing for a High Speed Vessel with Lifting Bodies
Hackett, J.P., Calix St. Pierre, J., Bigler, C., Peltzer, T.J., Quadvlieg, F.H.H.A. and Walree, F. van, SNAME Maritime Technology Conference & Expo and Ship Production Symposium, 2007
Controllability of high-speed craft
Calix St. Pierre, J., Hackett, J.P., Bigler, C. and Quadvlieg, F.H.H.A., PRADS 2007 10th International Symposium on Practical Design of Ships and Other Floating Structures, 2007
Seakeeping behaviour of a frigate-type trimaran
Pastoor W., Veer R. van't and Harmsen E., RINA conference on trimaran, London, UK, 2004
Hydrodynamic aspects of interest for the development of an integrated ride control system for high speed mono hulls
Jurgens, A.J. and Walree, F. van, FAST 2003 The 7th International Conference on Fast Sea Transportation, 2003
Pitch reduction in transit by using stabiliser fins
Gaillarde, G., the Modern Yacht - RINA conference, Southampton, 2003
Hackett, J.P., Calix St. Pierre, J., Bigler, C., Peltzer, T.J., Quadvlieg, F.H.H.A. and Walree, F. van, SNAME Maritime Technology Conference & Expo and Ship Production Symposium, 2007
Controllability of high-speed craft
Calix St. Pierre, J., Hackett, J.P., Bigler, C. and Quadvlieg, F.H.H.A., PRADS 2007 10th International Symposium on Practical Design of Ships and Other Floating Structures, 2007
Seakeeping behaviour of a frigate-type trimaran
Pastoor W., Veer R. van't and Harmsen E., RINA conference on trimaran, London, UK, 2004
Hydrodynamic aspects of interest for the development of an integrated ride control system for high speed mono hulls
Jurgens, A.J. and Walree, F. van, FAST 2003 The 7th International Conference on Fast Sea Transportation, 2003
Pitch reduction in transit by using stabiliser fins
Gaillarde, G., the Modern Yacht - RINA conference, Southampton, 2003
Ride control systems and Foil assist craft articles written for MARIN Report:
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
So far no entries have been published.
Contact
For more information on how MARIN can help your organisation with Ride control systems and Foil assist craft, please contact the MARIN ships department at ships@marin.nl
For more information on how MARIN can help your organisation with Ride control systems and Foil assist craft, please contact the MARIN ships department at ships@marin.nl