Development and validation of a computational process for pass-by noise simulation Online publication date: Mon, 10-May-2004
by Zhidong Zhang, Nickolas Vlahopoulos, T. Allen, K.Y. Zhang
International Journal of Vehicle Design (IJVD), Vol. 34, No. 1, 2004
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 numerical model. Numerical boundary element models that characterise the individual sources are combined with a vehicle model for developing a system model for pass-by noise simulation. The numerical algorithm for defining generic sources 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. Specifically, the generic 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.
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