Calcul du rayonnement acoustique de structures à partir de données vibratoires par une méthode de sphère équivalente

Abstract : The prediction of sound radiated by vibrating structures using measured or calculated data is of interest to many manufacturers because it allows them to anticipate, analyse and correct the noise emitted by a machine. Numerical methods for solving acoustic radiation problems such as Finite Element Method or Boundary Element Method have been widely developed but still remain difficult to apply since they require powerful calculators and experienced users. In order to limit computation time, the principle of equivalent sources has been applied and the structure replaced by a sphere which radiates the same acoustic field as the structure's one. The normal velocity field outo the surface of the structure, which is assumed to be measured or calculated, has been used to calculate the velocity field outo the sphere using a minimization technique (the actual equivalent sphere method) or a direct projection (geometrical approach). Both methods have been validated from numerical and experimental data associated...
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  • HAL Id : tel-00778519, version 1

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Laurent Bouchet. Calcul du rayonnement acoustique de structures à partir de données vibratoires par une méthode de sphère équivalente. Acoustique [physics.class-ph]. INSA de Lyon, 1996. Français. ⟨tel-00778519⟩

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