Sea cage
Full-scale sea cage in rough seas
Video:
Description:
A full-scale sea cage is studied in irregular short-crested waves.
- Full-scale sea-cage: 157m circumference, 20m deep, and a 15m cone.
- Standard mooring system: 4 corner buoys (4000l), crow feet with three cables, and a mooring frame at 5m depth.
- Rough sea state: 0.5m s-1 current, and irregular waves with a 2.5m significant wave height and 6s mean period.
Bottom trawling
Simulation of a bottom trawl system
Video:
Description:
Simulation of a full-sized bottom trawl system using FhSim.
- Full-sized trawl: Mørenot 520, 2 trawl doors at 8m², and a warp length of 500m.
- Towing: Basic ship model at 4 knots, with a towing depth of 190m.
Boat and net cage
Typical aquaculture operation with a boat and a net cage
Video:
Description:
- Full-scale net cage: Placed in a standard mooring frame, and affected by irregular seas
- Events: The boat first approaches the net cage. The crane on the boat is then attached to the coupling plate of the mooring frame. Finally, the the boat winches the coupling plate to the surface.
Pitch damping with foils
Exploring optimal foil design and position to dampen vessel pitch movements
Video:
Description:
- Pitch damping with foils: Vessels with smal length compared to other hull dimensions often have challenges with large pitch motions. This video shows simultaneous simulation of two vessels in the exact same seastate.
- The foreground vessel: This vessel has fitted a pitch-damping foil forward in the hull.
- The shadow vessel: This vessel has the same hull as the other, but is not fitted with pitch-damping foils.
Fish farm
Simulation of a fish farm with multiple net cages
Video:
Description:
The project RACE at SINTEF Ocean has developed methods to create simulations of fish farms consisting of multiple net cages based on limited user input.
Trawl colliding with offshore pipeline
Evaluating the risk of trawl door snagging on offshore pipeline
Description:
The ability to have FhSim perform parameter variations was used to evaluate how different parameters affected the risk of having trawl doors snagging on offshore pipelines. Typical parameters which were considered were span height, span length, pipeline diameter, angle between pipeline and trawling direction.
State estimation
Improve inaccurate measurements using state estimation
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Description:
Using FhSim built-in methods for state estimation.
Trawl impact on mooring
Analysis of trawl impact on mooring lines.
Video:
Description:
Analysis of the impact a trawl can do on mooring lines.
Structures in ice floe
Simulation of interactions between structures and ice floe
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Description:
Vessel in ice (cosimulation)
Simulation of a vessel hull in ice, using cosimulation.
Video:
Description:
Simulation of a moored vessel in ice and waves. The vessel is modelled in SIMO (https://www.sima.sintef.no/simo/) and the ice floes are modelled in FhSim (https://fhsim.no). The two sub-models are coupled through co-simulation based on the Functional Mock-up Interface (https://fmi-standard.org/).
Digital twin of fish farm
Simulating a fish farm in real time, syncronised with the real farm using measurements.
Video:
Description:
Real-time simulation of fish behaviour and bio-interactive ROV operations in an aquaculture net cage. The simulated fish are interacting with the ROV, and an adaptive guidance system is implemented for net inspection operations in order to reduce disturbance of the ROV to the fish. The feeding process is also simulated which starts at 1000 s. This can act as a digital twin for real-time monitoring of aquaculture net cage systems (in combination with online sensor data) and operational planning (in combination with online weather forecast data).
