Modelling and FEA-simulation of the anisotropic damping of thermoplastic composites

Characteristic amplitude-frequency functions of the radiated sound power

“…6,16 Therein, the modal damping can be modelled with an energetic approximation of anisotropy. 19,24 The simulation-based design of dynamically loaded and acoustically sensitive components essentially includes the determination of the sound power as a common measure of the structure borne sound. Regarding several simplifications different approaches based on the normal velocity of the radiating surface can be applied, e.g.…”

“…20 The required frequency steps of steady state dynamic FE-simulations are determined using efficient modal super imposed models. 19 Based on the results of a certain frequency range with a constant or mode based frequency stepping the total radiated sound power as a scalar acoustic objective can be formulated either based on power or energy levels. 17 In contrast to numerous required frequency steps an efficient simulation model is essential in solving such complex optimisation problems.…”