Achim Hepberger

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The wave based method (WBM) is considered for the steady-state dynamic analysis of acoustic problems as an alternative for the finite element method (FEM). The WBM exhibits better convergence properties with respect to model sizes, but the computation (CPU) times obtained by the current MATLAB implementation are large compared to commercially available FEM(More)
The paper discusses the application of the Wave Based Method (WBM) for the steady-state acoustic response prediction of a car cavity up towards the mid-frequency range. After explaining the need for new prediction tools, the mathematical background of the WBM is given. The prediction results are compared with the results obtained by the Finite Element(More)
In recent years the boundary element method (BEM) has become a well established tool for the analysis of acoustic problems involving unbounded domains, such as sound radiation or sound scattering problems. The BEM is based on a boundary integral formulation, which relates the field variables in the solution domain to a set of variables defined on the(More)
The recently developed wave based technique for the analysis of vibro-acoustic problems is a promising prediction tool aiming to bridge the existing mid-frequency gap. Instead of simple polynomial shape functions, this method adopts an indirect Trefftz approach in which it uses the exact solutions of the governing differential equation for the field(More)
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