A Modeling Method of Ship Acoustic Wake Echo Signal

Abstract

It is an important way to study the ship wake by building simulation data through the acoustic wake echo signal model. At present, the scattering echo of a single bubble is ignored in the existing models. Therefore, a point scattering model for different regions was proposed in this paper. Firstly, the wake geometry model was determined according to the ship size, speed, and sea condition, and then the wake was divided into different scattering regions according to the bubble size distribution(BSD). The range of the wake homing system was determined according to the beam width, position, and launch angle of the transmitting and receiving platform. Finally, the range of the wake homing system was divided into finite scattering elements, and the scattering echo signal was calculated according to the point scattering model after considering the propagation loss. The results of simulation and water tank experiments show that the model can be used in ship wake simulation and provide support for further wake detection and identification.

Keywords

• ship
• acoustic wake echo signal model
• finite element
• point scattering model for different regions