Abstract
The indirect boundary-element analysis is employed for developing a computational pass-by noise simulation capability. An acoustic field reconstruction process is developed in order to generate the definition of the main pass-by noise sources in a computational model. Numerical boundary-element models that characterize the individual sources are combined in order to develop a system model for the pass-by noise simulation. The acoustic field reconstruction process is validated initially by employing analytical solutions. The numerical techniques are also validated through comparison between numerical results and test data for component-level and system-level analyses. Specially, the source definition capability is validated by comparing the actual and the computationally reconstructed acoustic field for an engine intake manifold. The overall pass-by noise simulation capability is validated by computing the maximum overall sound-pressure level for a vehicle under two different driving conditions. [Research supported by the Ford University Research Program.]
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