Abstract
This paper presents a newly developed panel contribution analysis using the Helmholtz equation least squares method for a large complex structure. The approach requires only one set of the acoustic pressures measured in the near field of a vibrating structure. Using these input data, the normal surface velocity and acoustic pressure are reconstructed, from which the normal acoustic intensity distribution is calculated. Next, the normal acoustic intensity is correlated to the acoustic pressure at any field point of interest. In this way, the relative contributions from individual panels toward acoustic radiation at any field point can be ranked, and the critical panel(s) of a vibrating structure can be identified. Numerical simulations using this approach for identifying critical panels inside a passenger compartment are presented.
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