Closed Flexible Fish Cages: Modelling and Control of Deformations

Closed Flexible Fish Cages are proposed used in the sea, to meet with ecological challenges in the aquaculture industry. Earlier experiences with structural collapse of a similar concept have shown that it is crucial to secure the cage against rifts and escapes. To ensure this, a method to detect leakages and pump failure at an early stage must be developed. To detect leakages it is important to know how the bag deforms under static conditions for lower filling levels. In this paper a new method for modelling the deformed shape of the bag for decreasing filling level is proposed. Experimental data are analysed related to deformations on the bag for different filling levels, under static conditions.