Suppression Analysis of Underwater EM Signal Error Due to Pipeline Array Resonance

Vortex induced oscillation of underwater pipeline array brings the effects of both the three-component directivity variation of EM transducer and the enhancement of self-noise into the system, thus measurement accuracy of EM signal induced by underwater target is greatly reduced. This paper analyzes the characteristics of moving water and resonance suppression theory, summarizes the optimized method to design pipeline array, and adopts finite element simulation to realize the aim of resonance suppression. The simulation result shows that the EM signal detection ability is enhanced for the reason that the intrinsic frequency can be increased and become higher than the frequency of moving water by optimizing the length of pipeline array and boundary conditions.