Multipolar Harmonic Model applied to UEP Source Identification"
Résumé
Corrosion or adapted cathodic protection is responsible for UEP (underwater electric
potential) generation that may cause ship detection. As a consequence, ship electric
signatures are measured on dedicated ranges at given depth. Nevertheless, to assess
the threat, the signature must be known at larger distances and for different
parameters (conductivity, water depth, number of conductive layers) depending on
ship operation zone. In previous work, a dipolar model has been proposed to
represent the electric field sources and exhibited good agreement with experiment. It
was based on ellipsoidal harmonic decomposition and the use of image methods.
The present paper deals with the generalization of the model to its multipolar
components. After presenting the model elaboration, the approach is tested on
numerical cases computed by CorOnS software, developed by the G2Elab in
cooperation with the DGA (Direction Générale de l’Armement).