Research on acoustic characteristics of a regular fluctuate deformed sphere

Acoustic characteristics of a regular fluctuant deformed sphere including its derived models in water is studied by using the planar elements method for forecasting echo characteristics of sonar targets. The effects of surface corrugation's height, period, frequency and azimuth angle of incident plane wave on the spatial distribution and frequency response characteristics of acoustic target strength are analyzed. The mechanism of the formation of spatial distribution characteristics of target strength in different frequency bands and different angles is discussed. The spatial distribution and frequency response characteristics of the target strength of the 3D printed regular fluctuant deformed nylon sphere is measured in acoustic tank, which are in good agreement with the theoretical computed results. Understanding and grasping the acoustic scattering characteristics of regular fluctuant deformed sphere is helpful to carry out research on controlling the scattering acoustic field by using the acoustic metamaterials.