From Exterior Wind Noise Loads to Interior Cabin Noise: A Validation Study of a Generic Automotive Vehicle

Neuhierl, Barbara; Senthooran, Sivapalan; Toppinga, Reinier; Jäger, Anke; Brink, Maarten; Lemke, Timo; Moron, Philippe; Mutnuri, Raghu

doi:10.4271/2015-01-2328

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The exterior wind noise including broadband and high frequencies transmits into the passenger cabin through the structural panel, like windows and other metal panel, and a better alternative is to solve the noise transmission processes in the statistical way. In the method of statistical energy analysis (SEA), which is commonly used in vehicle interior noise prediction, an aero-vibro-acoustic analysis of a generic vehicle 5 and Mercedes-Benz A-class, 6 using an SEA approach, is validated by wind tunnel measurements, and the simulated results correspond well with experiments.…”

Section: Introductionmentioning

confidence: 90%

Aerodynamic noise prediction of passenger vehicle with hybrid detached eddy simulation/acoustic perturbation equation method

Zhong

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part D:

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Aerodynamic noise significantly affects the ride comfort of vehicle. A hybrid method combining detached eddy simulation and acoustic perturbation equations was used together with wind tunnel experiment to perform the aerodynamic noise investigation of a passenger vehicle. A good agreement of exterior overall sound pressure level and turbulent pressure spectra was found between the experiment and simulation with 260 million cells. Both turbulent and acoustic pressures were used as power input in statistical energy analysis, and the predicted interior noise is consistent with the experiment. The turbulent and acoustic pressures show a closely related spatial distribution, while the distribution patterns are different due to the distinction in their ways of propagation. The turbulent pressure travels downstream together with flow, while the acoustic pressure radiates homogeneously. Through statistical energy analysis, the major aerodynamic noise sources are identified as underbody for frequencies under 200 Hz and windows above 200 Hz, respectively. Finally, the studies of mesh resolution show that the finer mesh with 260 million cells can provide better results, while the coarser mesh with 90 million cells performs relatively poorly.

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Section: Introductionmentioning

confidence: 90%

Aerodynamic noise prediction of passenger vehicle with hybrid detached eddy simulation/acoustic perturbation equation method

Zhong

Wang

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

Generation of interior cavity noise due to window vibration excited by turbulent flows past a generic side-view mirror

Yao

Davidson

2018

Physics of Fluids

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We investigate the interior noise caused by turbulent flows past a generic side-view mirror. A rectangular glass window is placed downstream of the mirror. The window vibration is excited by the surface pressure fluctuations and emits the interior noise in a cuboid cavity. The turbulent flows are simulated using a compressible large eddy simulation method. The window vibration and interior noise are predicted with a finite element method. The wavenumber-frequency spectra of the surface pressure fluctuations are analyzed. The spectra are identified with some new features that cannot be explained by the Chase model for turbulent boundary layers. The spectra contain a minor hydrodynamic domain in addition to the hydrodynamic domain caused by the main convection of the turbulent boundary layer. The minor domain results from the local convection of the recirculating flow. These domains are formed in bent elliptic shapes. The spanwise expansion of the wake is found causing the bending. Based on the wavenumber-frequency relationships in the spectra, the surface pressure fluctuations are decomposed into hydrodynamic and acoustic components. The acoustic component is more efficient in the generation of the interior noise than the hydrodynamic component. However, the hydrodynamic component is still dominant at low frequencies below approximately 250 Hz since it has low transmission losses near the hydrodynamic critical frequency of the window. The structural modes of the window determine the low-frequency interior tonal noise. The combination of the mode shapes of the window and cavity greatly affects the magnitude distribution of the interior noise.

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From Exterior Wind Noise Loads to Interior Cabin Noise: A Validation Study of a Generic Automotive Vehicle

Cited by 2 publications

References 21 publications

Aerodynamic noise prediction of passenger vehicle with hybrid detached eddy simulation/acoustic perturbation equation method

Aerodynamic noise prediction of passenger vehicle with hybrid detached eddy simulation/acoustic perturbation equation method

Generation of interior cavity noise due to window vibration excited by turbulent flows past a generic side-view mirror

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