Design Improvement on Acoustic Responses of an Automotive Air Intake System

The project is to analyze the acoustic level of an Air Intake System (AIS). Harmonics Acoustics in ANSYS was used to identify the areas that have high noise resonance. The sound pressure levels and the resonance were identified. Design modifications were made on AIS to improve its performance.

This project was conducted in conjunction with Proton Holdings to study and improve the acoustic performance of an automotive air intake system. Noise pollution has shown to cause adverse health effect and the automotive industry is one of the main contributors of noise pollution. There are multiple ways to tackle noise pollution and one of the methods is through the introduction of resonators into the air intake system. The acoustic performance of an air intake system is analyzed through the use of harmonics acoustics analysis module in ANSYS. An internal fill of the original geometry is used to determine the acoustic performance of the air intake system. The location of the resonance is determined using visual contours and a resonator is designed to combat the resonance at a set frequency. A study was also conducted to determine if the operating temperature of the air intake system will affect the acoustic response of the air intake system. The resonator is placed according the indicated location of the resonance indicated by the visual contour and a similar analysis is conducted on the modified air intake system. The results show that there is improvement in the resonance through the implementation of the resonator. However, additional noise is generated through the addition of said resonator. This effect can be confirmed through a literature review, showing a similar effect when implementing a resonator to combat resonance in an air intake system.

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