| Popis: |
Interior noise in an automobile vehicle is known to have an important influence on product acceptability and is therefore an important automobile design consideration. Lightweight unibody construction and other automobile weight‐saving efforts have been known to result in increased interior noise, particularly noise in the low‐frequency range (20‐200 Hz). Vehicle testing has indicated strong correlation between panel motion (i.e., vibrating roof, windows, floor, etc.) and this measured noise, and it has been suggested that the noise may be modulated by the passenger compartment cavity resonance. This paper reviews the application of the finite element method for analyzing the acoustics of the passenger compartment and for computing panel‐excited interior noise. By modeling the complete structural‐acoustic dynamic system, which is comprised of the interior acoustic resonances as well as the vibration modes of the structural enclosure, this analytic method can be used to identify the influence of individual... |
