General information
All ships in waves, either sailing or at anchor, encounter roll motions. These roll motions can case a discomfort to the crew and the passengers, but can - in extreme conditions - damage the ship and cause loss of cargo.The is for example the case for motor yachts, cruise vessels and ferries.
By reducing the roll motion, the workability, comfort and safety of a vessel can be improved and the likelihood of seasickness can be reduced. The increasing awareness that roll motion can cause problems has lead to a whole range of innovative develpments to decrease the roll motion. MARINs is working at the forefront of these developments to solve the problems of roll motions, such as anti rolling tanks, stabilsation fins and rudder roll systems.
All ships in waves, either sailing or at anchor, encounter roll motions. These roll motions can case a discomfort to the crew and the passengers, but can - in extreme conditions - damage the ship and cause loss of cargo.The is for example the case for motor yachts, cruise vessels and ferries.
By reducing the roll motion, the workability, comfort and safety of a vessel can be improved and the likelihood of seasickness can be reduced. The increasing awareness that roll motion can cause problems has lead to a whole range of innovative develpments to decrease the roll motion. MARINs is working at the forefront of these developments to solve the problems of roll motions, such as anti rolling tanks, stabilsation fins and rudder roll systems.
Services & Activities
Roll reduction has mainly been pushed by the motoryacht industry and later applied also to other type of vessels (e.g. cruise vessels, research vessels, and even container vessels). Key drivers of roll problems on motor yachts are it’s typical natural period of roll and the relatively low roll damping of the bare hull. The safety of the intact ship in steep waves from the stern quarter and the safety of the damaged ship in general lead to stability requirements that yield typical natural periods of roll in the range of 8-13 seconds. Because waves with the same periods occur frequently at sea, the relatively low damping leads to a relatively high resonant roll response of the unstabilised ship. The above observation has lead most developments in the direction of generating more roll damping. Considerable experience has been obtained on the stabilisation by means of Bilge keels, Anti-roll tanks (free surface tanks, and passive and active U-type tanks), Stabiliser fins and Rudder roll systems both in numerical simulations and by means of model testing.
Roll reduction has mainly been pushed by the motoryacht industry and later applied also to other type of vessels (e.g. cruise vessels, research vessels, and even container vessels). Key drivers of roll problems on motor yachts are it’s typical natural period of roll and the relatively low roll damping of the bare hull. The safety of the intact ship in steep waves from the stern quarter and the safety of the damaged ship in general lead to stability requirements that yield typical natural periods of roll in the range of 8-13 seconds. Because waves with the same periods occur frequently at sea, the relatively low damping leads to a relatively high resonant roll response of the unstabilised ship. The above observation has lead most developments in the direction of generating more roll damping. Considerable experience has been obtained on the stabilisation by means of Bilge keels, Anti-roll tanks (free surface tanks, and passive and active U-type tanks), Stabiliser fins and Rudder roll systems both in numerical simulations and by means of model testing.
Facilities & Tools
Roll stabilisation systems are tested in the following MARIN facilities:
Roll stabilisation systems are tested in the following MARIN facilities:
- Seakeeping and Manoeuvring Basin (SMB): Seakeeping and manoeuvring investigations using free sailing models and waves from arbitrary directions
- Offshore Basin: Various seakeeping and manoeuvring investigations using free sailing models for variable water depths, current and waves from arbitrary directions
Roll stabilisation systems can be evaluated by the SHIPMO, FREDYN, Gulliver and WASCO tools. Information on these tools can be found here.
Experience
Roll stabilisation systems are evaluated in most of our projects concerning yachts, cruise vessels and ferries. Varying from alignment of bilge keels to design of (active) U-type anti-roll tanks.
Roll stabilisation systems are evaluated in most of our projects concerning yachts, cruise vessels and ferries. Varying from alignment of bilge keels to design of (active) U-type anti-roll tanks.
Most recent Roll stabilisation systems papers presented by MARIN:
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Manoeuvring and Seakeeping Tests for 5415M
Toxopeus, S.L., Walree, F. van, and Hallmann, R., NATO AVT-189 Specialists Meeting on "Assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles", Portsdown-West, UK, 2011
CFD, Potential Flow, and System-Based Simulations of Course Keeping in Calm Water and Seakeeping in Regular Waves for 5415M
Stern, F., Toxopeus, S.L., Visonneau, M., Guilmineau, E., Lin, W.-M. and Grigoropoulos, G., NATO AVT-189 Specialists Meeting on "Assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles", Portsdown-West, UK, 2011
Hydrodynamics of large motor yachts: Past and Future Developments
Hooijmans, P. and Gaillarde, G., 2nd International Symposium on design and production of motor and sail yachts (MDY06), Madrid, Spain, 2006
Hydrodynamics of large motor yachts: Past experience and future developments
Gaillarde, G., Toxopeus, S.L., Verwoest, T.F. and Hooijmans, P.M., ATMA - Association Technique Maritime et Aeronautique, Paris, France, 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
Toxopeus, S.L., Walree, F. van, and Hallmann, R., NATO AVT-189 Specialists Meeting on "Assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles", Portsdown-West, UK, 2011
CFD, Potential Flow, and System-Based Simulations of Course Keeping in Calm Water and Seakeeping in Regular Waves for 5415M
Stern, F., Toxopeus, S.L., Visonneau, M., Guilmineau, E., Lin, W.-M. and Grigoropoulos, G., NATO AVT-189 Specialists Meeting on "Assessment of Stability and Control Prediction Methods for NATO Air and Sea Vehicles", Portsdown-West, UK, 2011
Hydrodynamics of large motor yachts: Past and Future Developments
Hooijmans, P. and Gaillarde, G., 2nd International Symposium on design and production of motor and sail yachts (MDY06), Madrid, Spain, 2006
Hydrodynamics of large motor yachts: Past experience and future developments
Gaillarde, G., Toxopeus, S.L., Verwoest, T.F. and Hooijmans, P.M., ATMA - Association Technique Maritime et Aeronautique, Paris, France, 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
Most recent Roll stabilisation systems articles written for MARIN Report:
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
Design considerations for yacht operations
Patrick Hooymans, MARIN Report, 2006
Two views on the success of CRS
Yung Shin & Roger Lepeix, MARIN Report, 2004
JIPs ‘Offloading Operability’ and ‘FPSO Roll’
Bas Buchner & Henk van den Boom, MARIN Report, 2001
Patrick Hooymans, MARIN Report, 2006
Two views on the success of CRS
Yung Shin & Roger Lepeix, MARIN Report, 2004
JIPs ‘Offloading Operability’ and ‘FPSO Roll’
Bas Buchner & Henk van den Boom, MARIN Report, 2001
Contact
For more information on how MARIN can help your organisation with issues on Roll stabilisation systems, please contact the ships seakeeping knowledge group.
For more information on how MARIN can help your organisation with issues on Roll stabilisation systems, please contact the ships seakeeping knowledge group.