Structural response
Long Base Strain Gauge, courtesy BES Long Base Strain Gauge, courtesy BES
General Information
In ship design the structural response is very important, as the structural integrity is one of the end products of the ship design. A distinction can be made between static structural response (e.g. hogging & sagging) and dynamic structural response (e.g. whipping and springing). The overall structural response during operation of time the vessel results in fatigue damage. The accumulated fatigue damage ultimately determines the life cycle of the vessel.

Service & Activities
At the Seakeeping Department the structural response of vessels is investigated by means of seakeeping model tests. These model tests are in general performed in the Seakeeping and Manoeuvring Basin.

The Trials & Monitoring department is specialised in full scale measurements and evaluation of structural response on board of ships.

Facilities & Tools
Structural response model tests are performed in the following MARIN facilities:

To measure and analyse structural response on board of ships, MARIN uses the following:

  • Strain gauges for stress measurements
  • Long bases strain gauges for measurements of ship deformation
  • Accelerometers
  • Pressure transducers
  • Natural input mode analysis software
The following tools are used to study structural response numerically:

  • ANSYS
  • FEM tools
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 Record
The list below gives a review of structural response projects carried out at MARIN:

  • Cooperative Research Ships (CRS)
  • Heavy Lift Vessel (Heerema) 2009
  • Girassol Buoy (Total) 2004-2008
  • Victoriaborg full scale structural loads monitoring (2004)
Most recent papers on structural response presented by MARIN
(complete overview of articles 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

Full scale wave and whipping induced hull girder loads
Aalberts P.J. and Nieuwenhuijs M.W., Hydroelasticity in Marine Technology, Wuxi, China, 2006

Offshore Monitoring; Real World Data for Design, Engineering and Operation
van den Boom, H., Koning, J. & Aalberts, P., Offshore Technology Conference (OTC), Houston, 2005

Cross Section VIV Model Test For Novel Riser Geometries
de Wilde, J.J. (MARIN), Sworn, A., H. Cook, H. (BP), Willis, N. and Bridge, C. (2H Offshore), DOT Conference, New Orleans, 2004

Most recent articles on structural response written for MARIN Report
(complete overview of articles can be found under Publications)

CrackGuard it's all in the name!
Mirek Kaminski, MARIN Report, 2011

New tests advance sloshing knowledge
MARIN Report, 2010

Fatigue Lifetime Assurance with Monitas
Mirek Kaminski, MARIN report, 2010

DCV Balder instrumented for lifetime extension
Pieter Aalberts, MARIN report, 2010

Lifetime prediction moves a step closer with fatigue damage sensors
Ingo Drummen, MARIN report, 2009

Contact
For more information on how MARIN can assist your organisation with structural response issues, please contact MARIN's Trials & Monitoring department

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