WAVES & motions

MARITIME RESEARCH PROGRAMME

To ensure safe design and operation, we are developing the specialist tools and competences needed to assess response and operational limits of maritime structures.

SAFE FROM DESIGN TO OPERATION

To ensure safe design and operation, we are developing the specialist tools and competences needed to assess response and operational limits of maritime structures. Waves are a key aspect for the safety of marine structures. It is thus important to increase our knowledge on realistic wave modelling. It is important to quantify the response of these structures in both operational and extreme wave conditions. When multiple structures are in close proximity they will influence each other and the interaction needs to be considered. On larger structures, flexibility will be an aspect to consider in determining the responses and the corresponding performance. Development of numerical tools, analytical analysis procedures and incorporation of real-world feedback of these topics, will be covered by the research programme. The prediction of long term effects under benign conditions is typically quite well covered with the state-of-the-art in simulations and model tests. For the assessment of extreme events this is currently less true. Implication of these events on the design of new and existing structures will be examined. Finally, the optimisation and combination of models, simulations and onboard operations will further enhance the performance of maritime structures and their operations.

Contact

Contact person photo

Jule Scharnke

Senior Project Manager

sub programmes

waves

The main objective of this sub-programme is to be able to reproduce any wave condition from a basin or seaway in numerical tools and vice versa.

waves

The main objective of this sub-programme is to be able to reproduce any wave condition from a basin or seaway in numerical tools and vice versa.

Non-linear motions & control

The objective of this sub-programme is to know and improve the performance of marine structures. It deals with the quantification of the performance of ships and offshore structures in both operational and extreme conditions.

Non-linear motions & control

The objective of this sub-programme is to know and improve the performance of marine structures. It deals with the quantification of the performance of ships and offshore structures in both operational and extreme conditions.

Multiple bodies

This sub-programme focusses on the modelling of hydrodynamic interaction between rigid bodies in close proximity in waves.

Multiple bodies

This sub-programme focusses on the modelling of hydrodynamic interaction between rigid bodies in close proximity in waves.

FLEXIBLE STRUCTURES

This sub-programme covers research related to structural response originating from various hydromechanical loading mechanisms. This includes research into fatigue loads, ultimate strength as well as noise and vibration. The goal of this sub-programme is to improve safety of floating structures by providing improved analysis procedures to assess structural loads in operational conditions.

FLEXIBLE STRUCTURES

This sub-programme covers research related to structural response originating from various hydromechanical loading mechanisms. This includes research into fatigue loads, ultimate strength as well as noise and vibration. The goal of this sub-programme is to improve safety of floating structures by providing improved analysis procedures to assess structural loads in operational conditions.

Extreme events

The mission of this sub-programme is to develop methodologies that can be applied for a wide range of events and applications. An extreme event can be related to impact loads on different types of structures, such as greenwater loading, wave-in-deck loading and slamming, but also among other things parametric roll.

Extreme events

The mission of this sub-programme is to develop methodologies that can be applied for a wide range of events and applications. An extreme event can be related to impact loads on different types of structures, such as greenwater loading, wave-in-deck loading and slamming, but also among other things parametric roll.

Performance evaluation & optimization

This sub-programme deals with the (automatic) performance evaluation and optimization of maritime structures in waves during the concept, design, and operational phases. The overall goal is to create a unified (automated) method to evaluate and optimize the complete design and operation.

Performance evaluation & optimization

This sub-programme deals with the (automatic) performance evaluation and optimization of maritime structures in waves during the concept, design, and operational phases. The overall goal is to create a unified (automated) method to evaluate and optimize the complete design and operation.
FUTURE OF OCEAN ENERGY AND SHIPPING
Better Ships, Blue Oceans’ to make ships cleaner, smarter and safer and to contribute to a sustainable use of the seas. Linking renewable energy, zero emission shipping and floating islands.
SEMI-SUBMERSIBLE IN WAVES
In the last decade, several mooring line failures have been reported for offshore structures in the North Sea. Such failures mostly occurred in severe sea states and are believed to be due to overloading of the mooring line loads. These failures showed the need to improve the methods and procedures in predicting the wave loads in harsh environments. The wave drift forces are especially important as they are a key parameter in the design of the mooring system. However, they tend to be underestimated by linear potential-flow based methods, which are still the work-horse design tool in the offshore industry. Model testing can be used to assess the wave drift loads and calibrate the numerical tools, but they are usually only performed in the final stage of the design.
In their research project Frédérick Jaouën, Arjen Koop, Tim Bunnik showed that MARIN’s in-house CFD code ReFRESCO is able to accurately calculate the wave drift loads on semi-submersibles in steep waves. This includes the prediction of the non-quadratic nature of the wave drift forces, which cannot be predicted by potential-flow based tools. The numerical results were validated based on the model tests performed on the
Stena Don platform in 2018. MARIN wishes to thank Stena for supporting us in this research project, and therefore contributing to our mission: Better ships, Blue oceans.
Interested in optimizing your design by minimizing the drift loads? Contact Frédérick Jaouën.
COMFLOW WAVE IN ROLING POOL
WAVE IMPACT RESEARCH - BREAKIN JIP
WIFI WAVE IMPACTS ON OFFSHORE WIND TURBINES
Improved design methods for wave impacts on offshore wind turbines.