Investigation of micro-perforated plate structure and cavity used as Helmholtz resonator in wheel arch liner

Abstract

Noise pollution, which is one of the pollutions in the developing world, affects human health and daily life. Cars make up a large part of this noise. This study focused on the transition noise reduction of automobiles by integrating the micro-perforated plate structure into the wheel arch liners. The noise absorption coefficients of the samples produced within the scope of the study were experimentally tested in Alpha Cabin and then validated with numerical simulations. When the results of the simulations were compared with the experimental test data, a compatible correlation was reached with the test data in terms of the reliability of the research. Finally, these structures were integrated and simulated in 4 different combinations on the wheel arch liners of a vehicle that is actively used in the market, and their noise absorption properties were compared with each other. As expected, while the noise absorption coefficients increased with the increase in perforated structures, combinations were obtained to meet the expectations of customers in the automotive industry. In addition, it is stated in the study results that the use of perforated structures in wheel arch liner (WAL) has the potential to reduce pass-by noise values.

Keywords

• WAL
• acoustic
• alpha cabin
• MPP
• noise absorption
• automotive

References

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