Acoustic property anticipation of structural coating based on an equivalent parameter inversion
In this paper,the effect of structural coating on the acoustic scattering characteristics of elastic plates is studied with the equivalent parameter inversion method.According to the measurement results of the acoustic characteristics of the structural coating and by using the genetic algorithm,the equivalent parameter inversion method is used to obtain the acoustic parameters of the structural coating with the same acoustic performance,then the coupled finite element and boundary element method is used to measure the scattering sound field and obtain the sound target strength before and after laying the coating,and finally the scattering sound fields before and after laying the coating on the single-and double-layer plates are tested in the anechoic pool.The comparison between the theoretical simulation results and the test results is made.The error between the calculated target echo strength difference before and after laying the coating and the corresponding test result is within 3 dB.The result indicates that the inversion model of the equivalent parameters of the structural coating based on the genetic algorithm can be applied to predicting the acoustic performances of the coating of complex structure.
structural coatingthe coupled finite element and boundary elementsound scatteringgenetic algorithm
万方数据
维普
