Characteristic amplitude-frequency functions of the radiated sound power

Abstract

The simulation-based design of dynamically loaded and acoustically sensitive components essentially includes the determination of the radiated sound power. Regarding several simplifications different approaches based on the surface velocity can be applied, such as the equivalent radiated sound power (ERP). The required frequency steps of steady state dynamic simulations are determined using efficient modal super imposed models. For single modes of rectangular plates, universal amplitude-frequency functions shall be identified. Considering the damping ratio of the mode, only one resonant frequency step is further needed for the estimation of the radiated sound power in the whole given frequency range. Computationally expensive steady state simulations thus are significantly reduced.