Application of the Wave Based Method for the Steady-state Acoustic Response Prediction of a Car Cavity in the Mid-frequency Range

摘要

The paper discusses the application of the Wave Based Method (WBM) for the steady-state acoustic responsernprediction of a car cavity up towards the mid-frequency range. After explaining the need for new predictionrntools, the mathematical background of the WBM is given. The prediction results are compared with thernresults obtained by the Finite Element Method (FEM). For validation purposes, both a simple analyticalrnbenchmark problem is considered as well as the 3-dimensional problem of the Sound Brick, which is a testrnsetup especially developed for validation experiments. It is demonstrated that the WBM is computationallyrnmore efficient than the FEM in both cases so that the practical frequency limitation for the WBM is muchrnhigher than for the FEM.