Nonlinear Rayleigh wave sound fields generated by a wedge transducer

Abstract

Linear and nonlinear Rayleigh wave sound fields generated by a wedge transducer are modeled. The calculated area sound sources are used to model the linear Rayleigh sound fields on the sample surface, which are more accurate than the previously assumed uniform or Gaussian line source. A more general nonlinear Rayleigh wave equation is developed and the solutions with quasilinear theory are obtained. The second harmonic sound field is given in an integral expression with the linear Rayleigh wave acting as a forcing function. The sound fields are simulated and some important aspects are discussed. The proposed method is effective in predicting the Rayleigh sound fields generated by wedge transducers.