Author(s): R. Adey & J. M. W. Baynham
Computer simulation has been widely used to predict the corrosion related
electric and electromagnetic signatures of naval vessels.
The modelling strategy
has varied from simple dipole type models to detailed boundary element models
of the vessel and its environment.
For the dipole models users have had to
choose the location and strength of the dipoles based upon experience, using
range data or data from similar vessels.
Whereas the boundary element model
enables the user to define the actual geometry of the vessel, the electrochemical
properties of the materials and the properties of the environment as data to the
model and obtain predictions of the electric and magnetic signatures.
This paper describes the simulation tools developed as part of the BEASY
software to predict electric and magnetic signatures.
Comparison is made
between results of the boundary element detailed models and the dipole type
The design of a cathodic protection system is of interest to defence organisations
not only to ensure the integrity of the ship but also because of the electric fields
generated in the sea water by the Cathodic Protection (CP) system.
are known as the signature of the ship.
Electromagnetic signatures are playing an important role in the detection of
naval vessels and in the fusing of intelligent mines.
The static electric signature
is the electric field associated with the DC corrosion or cathodic protection
current that flows through the seawater around a vessel.
This is sometimes
referred to as the Underwater Electrical Potential or UEP.
The corrosion related
magnetic (CRM) field is the coupled magnetic field caused by the corrosion
related electric currents flowing in the seawater between the anodes and the ship
Size: 1,618 kb
Paper DOI: 10.2495/ECOR070211
the Full Article
This article is part of the WIT OpenView scheme and you can download the full text Adobe PDF article for FREE by clicking the 'Openview' icon below.
this page to a colleague.