Prediction method of acoustic scattering from elastic target with structure anechoic coating layer at low frequency

The prediction method of acoustic scattering from elastic target with structure anechoic coating layer is investigated at low frequency. The physical model is acoustic scattering from elastic shell with structure anechoic coating layer. The transmission matrix method and parameter matching method are used to obtain the parameters of the equivalent homogeneous viscoelastic layers. The coupling method of finite element and boundary element is used to constitute the calculation model. Applying the theoretical model, the acoustic scattering form function of rigid cylindrical and elastic cylindrical shell with/without coating is computed at low frequency. And the acoustic scattering characteristics of the targets and the effect of the structure anechoic coating layer are analyzed.