Acoustic Modal Analysis for Vehicle Cabin

The tyre cavity resonance induced noise and vibration currently have no effective mass production solutions. All proposed solutions are hard to service and difficult to maintain. Different analysis approaches are presented in this paper to verify computer simulation models. Modal analysis results of the tyre cavity, tyre and rim structures were compared and a complex nature of tyre cavity acoustics is understood. Modified air cavities have been simulated. The research in this paper aims to find effective solutions for elimination of the coupled resonance mode by shifting the tyre cavity modal frequency.

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“…According to Nakanishi and Gerges (1995), the resonant frequencies of a rectangular air cavity prism with rigid walls are given by…”

Section: Computational Modelmentioning

confidence: 99%

A study of tyre, cavity and rim coupling resonance induced noise

Wang

Mohamed

Ren

et al. 2014

IJVNV

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“…As was mentioned above, such models are useful for understanding the physics of the problem and for simulation of the main features of a structuralacoustic system responsible for noise generation. In particular, purely acoustic experiments have been conducted on scale replicas of vehicle interiors with walls described by rigid boundary conditions [3,[24][25][26][27]]. In the examples described by Jha [3] and Lee et.…”

Section: Simplified Modelling Of Vehicle Interior Noise: Comparison Omentioning

confidence: 99%

“…al. [24], the model was a 1:2 scale replica of the passenger compartment of a saloon car, whereas Nakanishi [25] studied the acoustic properties of a 1:4.5 scale cavity that simulated a truck cab. Schroeder [26] and Gorman et.…”

Section: Simplified Modelling Of Vehicle Interior Noise: Comparison Omentioning

confidence: 99%

Simplified Modelling of Vehicle Interior Noise: Comparison of Analytical, Numerical and Experimental Approaches

Georgiev

Krylov

Winward

2006

Journal of Low Frequency Noise, Vibration and Active Control

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The present paper describes the results of the investigation of low and medium frequency vehicle interior noise carried out using simplified structural-acoustic models. Analytical, finite element (FE) and experimental studies are presented and compared. In particular, the analytical approach is based on the formula representing the interior acoustic pressure in terms of structural and acoustic normal modes. This procedure does not take into account the effect of the enclosed air on structural vibrations. The FE analysis considers structural vibration modes, interior acoustic modes, full structural-acoustic interaction and the resulting structure-borne noise. The above-mentioned analytical and numerical results are compared with each other, and both of them are compared with the experimental results obtained for the simplified reduced-scale vehicle model "QUASICAR" developed in Loughborough University. The comparisons demonstrate some specific features of the analytical and numerical approaches and outline the acceptable limits of simplification in modelling vehicle interior noise. Although this study is concerned with structure-borne vehicle interior noise, its results and conclusions could be of interest for a wider range of engineering problems, such as building acoustics and dynamics of thin shell structures.

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“…It can be considered as a time filtration function -only those natural structural p and acoustic m frequencies which coincide with the Vol. 25 No . 2 2006 V.B.…”

Section: Theoretical Considerationsmentioning

confidence: 99%