Research on the forward and inverse modeling of corrosion electric fields for underwater vehicles

BiCheng ZHANG, BaoJun WEI, RongZhen WANG, Jian LIU

Prog Geophy ›› 2026, Vol. 41 ›› Issue (5) : 2319-2329.

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Prog Geophy ›› 2026, Vol. 41 ›› Issue (5) : 2319-2329. DOI: 10.6038/pg2026JJ0413

Research on the forward and inverse modeling of corrosion electric fields for underwater vehicles

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Abstract

The corrosion electric field generated by equivalent electric dipoles of an underwater vehicle in multilayer seawater environment was simulated using ultra-low frequency dyadic Green's function for stratified media. The influence of the seawater's conductivity, depth, and stratification state on different components of the corrosion electric field was analyzed. By combining the dyadic Green's function with the Particle Swarm Optimization (PSO) algorithm, the location and intensity of equivalent electric dipoles with different number were inverted. The calculation results showed that the intensity of the corrosion electric field in seawater will decrease with increasing seawater's conductivity and they are inversely proportional to each other. Since the normal component of the electric field is discontinuous at layer interfaces, this component can be used to determine the interface position of stratified seawater. The inversion results of the corrosion electric field become more and more accurate with increasing number of equivalent electric dipoles. The consistency between the inversion results and the simulation results of the corrosion electric field of the underwater vehicle indicated that it is feasible to replace the underwater vehicle's electric field with the equivalent d ipole's electric field.

Key words

Underwater vehicle / Corrosion electric field / Dyadic Green's function / Equivalent electric dipole / Particle Swarm Optimization (PSO) algorithm

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BiCheng ZHANG , BaoJun WEI , RongZhen WANG , et al. Research on the forward and inverse modeling of corrosion electric fields for underwater vehicles[J]. Progress in Geophysics. 2026, 41(5): 2319-2329 https://doi.org/10.6038/pg2026JJ0413

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