Abstract
In the present work, an extension of the well known acoustic-structural analogy is developed. It concerns a simple application of the finite element method to the convected one-dimensional wave equation. For this kind of problem the convective effect was simulated using a fictitious ‘damping’ matrix. The examined problem was a classical muffler geometry for which the transmission loss and the fundamental acoustic frequency were evaluated by using a standard structural finite element code. Several results are also shown, and they demonstrate that the latter parameters can be easily analyzed as a function of the Mach number.
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