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Acoustic radiation prediction of engine

Real part of external acoustic pressure field (1000 Hz)

Real part of external
acoustic pressure field (1000 Hz)

An example of acoustic radiation problem using the mesh mapping capability is showed here. We have the structural CAD model (simplified real model, for confidentiality reasons, presented on Figure « Engine CAD model ») and an acoustic CAD model.

External forces (coming from an electromagnetic analysis) are applied to each pairs of poles in the frequency domain to the structural model and the frequency response was computed and mapped to the acoustic radiation surface mesh (Figure « Engine acoustic model »).

Engine CAD model
Engine acoustic model
Engine CAD model Engine acoustic model



Once all the displacements are mapped from structural mesh to acoustic mesh, an uncoupled acoustic radiation is performed. We can then predict the radiated acoustic power. Also, if we perform an inverse Fourier transformation, we can build wave files to ear how the engine sounds like.

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