To optimize the noise level in the interior of the car body the simulation of the resonance excitated by the periodic excitation forces the finite difference method is used. The resonance has two possible sources: the mechanical mode and the acoustical mode. To define this two modes, first the two dimensional analysis on quadratic pressure uniforme fields are mathematically modeled. The first model is a rectangular body, the second is the body of the 'Zastava 101' car. The achieved results are compared to the practically measured results and the difference is lower than 2 %. Afterwards an analysis by the finite elemente method is made by triangular elements. The differences are lower than 5 %. The method is able to be used to define the places of the greatest accoustic emission, to make afterwards the correction in the design of the car body. (Jarc)
Determination of acoustic pressure in car interior with rigid walls by method of final differences
Die Schalldruckermittlung in der Autokarosserie mit starren Waenden mittels der Finite Differenz Methode
Titel serbokroatisch
Tehnika ; 36 , 11 ; 1073-1075
1987
3 Seiten, 3 Bilder, 2 Tabellen, 3 Quellen
Article (Journal)
Serbo-Croatian
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