APPLICATION OF THE FINITE ELEMENT METHOD TO FORECASTING THE ACOUSTIC CHARACTERISTICS OF SOUND FIELDS IN AIR

The possibility of applying the finite element method to the modeling of acoustic fields is investigated and the coincidence of the simulation results with the results of field measurements is quantified. The finite element method is one of the two most common numerical methods of computer simulation. This article shows the results of modeling different acoustic characteristics on specific examples. Among them are the determination of the natural frequencies of the system with distributed parameters and the visualization of natural forms of oscillations. In addition, the possibility of applying this method to determine the acoustic characteristics of the room, which were previously determined by statistical or radiation theory, was shown. The possibility of applying this method to the determination of acoustic fields in semi-infinite media with a rather complex geometry, which is almost impossible to describe by analytical dependences, is also shown. In addition, the simulation results were compared with the results of field tests. The limits of similarity of the results were shown, and the reasons for the discrepancy were pointed out. The results of such studies will expand the scope of the finite element method and make it possible to assess the accuracy of computer simulations using this method.