General information
Ships and offshore structures are exposed to waves which impose pressures and forces on the constructions. The summation of the local forces caused by waves give the global wave loads, i.e. loads like bending and torsion moments, splitting forces, hinge loads for articulated structures, drift forces or wave added resistance. These global wave loads form a basis for the design and construction of ships and offshore structures. This can be in terms of ultimate strength for survival conditions, design loads for normal operations or long term distributions with respect to fatigue.
Ships and offshore structures are exposed to waves which impose pressures and forces on the constructions. The summation of the local forces caused by waves give the global wave loads, i.e. loads like bending and torsion moments, splitting forces, hinge loads for articulated structures, drift forces or wave added resistance. These global wave loads form a basis for the design and construction of ships and offshore structures. This can be in terms of ultimate strength for survival conditions, design loads for normal operations or long term distributions with respect to fatigue.
Services & Activities
MARIN offers calculations, experiments and full scale measurements to obtain global wave loads on ships and offshore structures. The simulation and analysis of these loads by means of frequency and time domain simulation tools as well as by experiments is done on a regular basis. Calculations are performed with a variety of software tools well adapted for different types of floating structures. In our testing facilities global wave loads are determined in short and long crested seas in combination with wind and current.
The knowledge group Seakeeping investigates the global wave loads and wave added resistance of ships sailing at forward and zero speed.
The Offshore Department investigates the global wave loads and drift forces of structures at low and zero speed
The Trials & Monitoring Department is involved in full-scale measurements and monitoring of ship and structures
MARIN offers calculations, experiments and full scale measurements to obtain global wave loads on ships and offshore structures. The simulation and analysis of these loads by means of frequency and time domain simulation tools as well as by experiments is done on a regular basis. Calculations are performed with a variety of software tools well adapted for different types of floating structures. In our testing facilities global wave loads are determined in short and long crested seas in combination with wind and current.
The knowledge group Seakeeping investigates the global wave loads and wave added resistance of ships sailing at forward and zero speed.
The Offshore Department investigates the global wave loads and drift forces of structures at low and zero speed
The Trials & Monitoring Department is involved in full-scale measurements and monitoring of ship and structures
Facilities & Tools
Global wave loads are tested in the following MARIN facilities:
Global wave loads are tested in the following MARIN facilities:
- Seakeeping & Manoeuvring Basin: seakeeping and manoeuvring tests
- Offshore Basin: offshore tests including waves, wind and current
Global wave loads is simulated with the following tools:
PRECAL: 3-D potential theory incl forward speed formulation
PRECAL: 3-D potential theory incl forward speed formulation
Software Sales
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Some software tools are available for commercial use outside MARIN. A complete overview of these software tools for sale can be found under Software Sales.
Experience
Global wave loads are evaluated in our projects on a regular basis. Varying from hinge loads of a tug&barge, measurement of bending moments and torsion on very large ships to second order wave drift forces on semi-submersibles.
Global wave loads are evaluated in our projects on a regular basis. Varying from hinge loads of a tug&barge, measurement of bending moments and torsion on very large ships to second order wave drift forces on semi-submersibles.
Most recent global wave loads papers presented by MARIN
(complete overview of papers can be found under Publications)
(complete overview of papers can be found under Publications)
Evaluating the Loading and Structural Response of an Offshore Platform Using Integrated Large and Small Scale Testing Combined With Diffraction and Finite Element Analysis and Offshore Measurements
Bas Buchner, Robert Heerink and Jaap de Wilde (MARIN), Joel Witz (Hess) and Karen la Cour Hjelholt (Ramboll), Offshore Technology Conference (OTC), 2009
Sensing and Understanding Fatigue Lifetime of New and Converted FPSOs
Mirek Kaminski (MARIN), Offshore Technology Conference (OTC), Houston, 2007
Offshore Monitoring; Real World Data for Design, Engineering and Operation
van den Boom, H., Koning, J. & Aalberts, P., Offshore Technology Conference (OTC), Houston, 2005
Wave Impact Excitation on Ship Type Offshore Structures in Steep Fronted Waves
Voogt, Arjan, Buchner, Bas and Lopez-Cortiji Garcia, Joaquin, OMAE Speciality Symposium on FPSO Integrity, Houston, 2004
Prediction of Wave Impact Loads on Ship-type Offshore Structures in Steep Fronted Waves
Voogt, Arjan and Buchner, Bas, ISOPE Conference, Toulon, 2004
Bas Buchner, Robert Heerink and Jaap de Wilde (MARIN), Joel Witz (Hess) and Karen la Cour Hjelholt (Ramboll), Offshore Technology Conference (OTC), 2009
Sensing and Understanding Fatigue Lifetime of New and Converted FPSOs
Mirek Kaminski (MARIN), Offshore Technology Conference (OTC), Houston, 2007
Offshore Monitoring; Real World Data for Design, Engineering and Operation
van den Boom, H., Koning, J. & Aalberts, P., Offshore Technology Conference (OTC), Houston, 2005
Wave Impact Excitation on Ship Type Offshore Structures in Steep Fronted Waves
Voogt, Arjan, Buchner, Bas and Lopez-Cortiji Garcia, Joaquin, OMAE Speciality Symposium on FPSO Integrity, Houston, 2004
Prediction of Wave Impact Loads on Ship-type Offshore Structures in Steep Fronted Waves
Voogt, Arjan and Buchner, Bas, ISOPE Conference, Toulon, 2004
Most recent global wave loads articles written for MARIN Report
(complete overview of articles can be found under Publications)
(complete overview of articles can be found under Publications)
JIP “Monitoring 9000t” already gets results
In the past decade, typical coastal general cargo vessels have been developed into large,multi-purpose,container vessels. To investigate the structural loads and responses of such vessels during operation the Joint...
In the past decade, typical coastal general cargo vessels have been developed into large,multi-purpose,container vessels. To investigate the structural loads and responses of such vessels during operation the Joint...
Contact
For more information on how MARIN can help your organisation with Global wave loads, please contact:
For offshore structures: Offshore Department
For ships: Knowledge group seakeeping at seakeeping@marin.nl
For full scale measurements: Trials & Monitoring Department
For more information on how MARIN can help your organisation with Global wave loads, please contact:
For offshore structures: Offshore Department
For ships: Knowledge group seakeeping at seakeeping@marin.nl
For full scale measurements: Trials & Monitoring Department