Hybrid finite element - wave based method for steady-state acoustic analysis

This paper considers the extension of the frequency application range of the finite element method (FEM) applied to steady-state acoustic problems. This is achieved by the hybrid coupling of the FEM with the wave based method (WBM). The WBM is a computationally efficient alternative for the FEM, but it is restricted to acoustic problems of moderate geometrical complexity. The hybrid finite element - wave based method (HFE-WBM) benefits from the advantageous features of both methods. These are the high geometrical flexibility of the FEM and the computational efficiency of the WBM. The potential of the HFE-WBM to provide more accurate predictions for higher frequencies than the FEM is illustrated for the validation of a numerical example of a 2D acoustic car cavity.status: publishe