講演情報
[9a-N104-3]Optimisation of Submarine Platform Corrosion Related Signatures
〇Paul Rawlins1, Sarah Evans1, Samantha Davidson1 (1.ESCO)
キーワード：
corrosion、signatures、minimisation
Detectability of submarine platforms from corrosion related signatures pose a constant risk to operations throughout a patrol. The corrosion related signatures manifest themselves due to current flow between bare materials, coating loss from the hull, free-flood spaces and the corrosion protection (CP) systems, both active and passive, employed to prevent corrosion.
In order to reduce the risk from detection it is desirable to minimise signatures resulting from the corrosion process as much as is practicable. Minimising the corrosion related signatures requires the ability to control current flow and hence submarines are fitted with advanced CP systems. These advanced systems use actively controlled anodes which allow the current flow to be moderated during a patrol thus reducing these signatures. In order to generate the control signals required to be applied to the CP anodes to minimise the corrosion related signatures, it is necessary to understand the relationships between the applied anode current, the platform’s hull voltage potential and the spatial propagation of the electric and magnetic fields.
The purpose of this paper is to describe the methodologies used to obtain minimal corrosion related signatures and the modelling processes that are used to verify and validate that the design solution meets the performance criteria. A description of the numerical modelling process of the platform will be given, detailing how the models are constructed and are employed to calculate the necessary anode and cathode effects to understand the corrosion related signatures. It will be shown how the minimisation of the corrosion related signature can be formulated as a canonical constrained Least Squares problem, and examples using synthetic data will be provided demonstrating the process.
In order to reduce the risk from detection it is desirable to minimise signatures resulting from the corrosion process as much as is practicable. Minimising the corrosion related signatures requires the ability to control current flow and hence submarines are fitted with advanced CP systems. These advanced systems use actively controlled anodes which allow the current flow to be moderated during a patrol thus reducing these signatures. In order to generate the control signals required to be applied to the CP anodes to minimise the corrosion related signatures, it is necessary to understand the relationships between the applied anode current, the platform’s hull voltage potential and the spatial propagation of the electric and magnetic fields.
The purpose of this paper is to describe the methodologies used to obtain minimal corrosion related signatures and the modelling processes that are used to verify and validate that the design solution meets the performance criteria. A description of the numerical modelling process of the platform will be given, detailing how the models are constructed and are employed to calculate the necessary anode and cathode effects to understand the corrosion related signatures. It will be shown how the minimisation of the corrosion related signature can be formulated as a canonical constrained Least Squares problem, and examples using synthetic data will be provided demonstrating the process.