A Method for Modelling the Dynamic Echo Characteristics of Propellers

Abstract Based on the study of the static sound scattering characteristics of propellers, the dynamic analysis of the propeller static sound scattering characteristics at different moments is carried out during the modulation period. A method for predicting the sound scattering characteristics of curved thin plate targets based on the combination of sound propagation theory and discrete surface element thickness information is established using the slab element algorithm. The reflection coefficients of all surface elements are solved based on the thickness and material attribute information of the surface elements, and the total scattered sound field of the target is obtained. Finally, statistical analysis is carried out on the simulation data to obtain the typical scattering characteristics of propellers under different speeds and frequencies.