Ship reference: ITTC-Box (Aalto University & NAPA)
Ship information
Box-shaped barge (nominal scale 1:10)
Model dimensions: - Length: 4.0 m - Breadth: 0.80 m - Draft (in tests) 0.50 m
Used for the ITTC benchmark study in 2007
Data provided by:
Napa Ltd & Aalto University, Finland Funded by: Napa Ltd and Tekes (the Finnish Funding Agency for Technology and Innovation)
Definition data:
- Hull form and compartments in: Rhino 3dm format (v.4 and v.5), iges-format
- NAPA database with definitions of hull and internal compartments
- Detailed document with all dimensions and discharge coefficients for the openings
Experimental data:
4 different flooding scenarios, measurement data includes:
- Roll, pitch and heave motions
- Water levels in all flooded compartments
- Air pressures in the double bottom compartments
Enclosed documentation:
Ruponen, P., Sundell, T., Larmela, M. 2007. Validation of a simulation method for progressive flooding, International Shipbuilding Progress, Vol. 45, pp. 305-321.
Ruponen, P. 2006. Model tests for the progressive flooding of a box-shaped barge, Report M-292, Helsinki University of Technology, Ship Laboratory.
Data sheet for the original ITTC benchmark study: - instructions for interpreting the provided measurement data - detailed information on the geometry of the barge and the flooded compartments
Contact(s) for additional information
PekkaRuponen e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Reference: GustoMSC – Offshore Stability - Jack-up & Semi-sub data
Structure information
1 Jack-up:
This jack-up was originally found in a publication of ABS and is purely a schematic shape not a copy of a real design.
Reference:
Breuer, J.A. and Sjöland, K.G., 2006, “Orthogonal Tipping in Conventional Offshore Stability Evaluations”,
Proceedings of the 9th International conference on Stability of Ships and Ocean Vehicles (STAB 2006).
2 Semi submersible:
This semi submersible is found in a publication of GustoMSC and is purely a schematic shape not a copy of a real design.
Reference:
Santen, JA van, The use of energy build up to identify the most critical heeling axis direction for stability calculations for floating offshore structures, STAB 2009 Conference St Petersburg
Hull geometry data
·Plan of form as found in the ABS and GustoMSC publications
·3D hull form (Rhino+IGES, kindly prepared by Gabriele Bulian)
For the semi submersible take care to have a proper width for the damaged compartment of 6 m instead of 7 as found in an earlier version of the publication
Loading condition(s)
One draught, one KG intact and damaged
Numerical data
Calculation of the righting arms for various cases defined by axis direction and calculation method.
Enclosed documentation
1.Santen, J.A., The use of energy build up to identify the most critical heeling axis direction for stability calculations for floating offshore structures, review of various methods, 12th Jack Up Conference 2009, City University, London
2. Results with GustoMSC’s program DAMAST
Contact(s) for additional information/data
For any request of information please contact:
JA van Santen:
·e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
·Phone: +31 10 2883 824
F Blaauw
·e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
The distributed data are the results from a computational experimental campaign carried out by the David Taylor Model Basin (NSWC/CD), West Bethesda, MD, USA. The work was sponsored by the US Navy’s Naval Sea System Command (NAVSEA) PMS 500.
Hull geometry data
Three dimensional hull forms (bare hull).
File formats: IGES
Loading condition(s)
One loading condition for each model
Numerical data
Comparative analysis of several existing computer codes in their ability to calculate potential flow forces and moments acting on hulls in motions that range from small to large. Several potential flow programs were selected to compute the forces and moments exerted on bodies undergoing various prescribed motions. The flow configurations ranged from a regime where linearity might be sufficient to regimes where nonlinearities are expected to be important. Code runners, in most cases the code developers, were assigned well-defined tasks of three types:
one where the ship undergoes 1-DOF prescribed oscillations in calm water (task 1, the radiation problem), one where the ship advances with zero degrees of freedom at a fixed forward speed in waves (task 2, the diffraction problem), and one where the ship undergoes hybrid 2-DOF prescribed motion in waves (task 3, the nominal wave contouring problem). Each task assigned to a code runner required the computation to be done for two speeds and two models scaled to full size.
Enclosed documentation
1.Telste, J.G., Belknap, W.F., "Potential Flow Forces and Moments from Selected Ship Flow Codes in a Set of Numerical Experiments", Naval Surface Warfare Center, Hydromechanics Department Report NSWCCD-50-TR–2008/040, May 2008
Additional information
Contact(s) for additional information/data
For any request of information please contact:
Arthur M. Reed
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Phone: +01-301-227-4309
Carderock Division, Naval Surface Warfare Center
Code 504
9500 MacArthur Boulevard
West Bethesda, MD 20817-5700
USA
William F. Belknap
e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
