Abstract
The axle whine noise will eventually affect the vehicle noise performance. In this study, a systematic modeling approach is developed to analyze the axle whine problem by considering the hypoid gear mesh from the tooth contact process as well as the system dynamics effect with gear design parameters and shaft-bearing-housing system taken into account. Moreover, the tuning of the dominant air-borne path is modeled analytically by using the sound transmission loss idea. First, gear tooth load distribution results are obtained in a 3-dimensional loaded tooth contact analysis program. Then mesh parameters are synthesized and applied to a linear multibody gear dynamic model to obtain dynamic mesh and bearing responses. The bearing responses are used as the excitation force to a housing finite element model. Finally, the vibroacoustic analysis of the axle is performed using the boundary element method; sound pressure responses in the axle surface are then simulated. Transmission losses of different panel partitions are included in the final stage to guide the tuning of air-borne paths to reduce the radiated axle whine noise. The proposed approach gives a more in-depth understanding of the axle whine generation and therefore can further facilitate the system design and trouble-shooting.
Highlights
There are several noise sources inside a vehicle cabin, such as engine, tire-road, wind, and various electrical components
It is obviously seen that the overall noise reduction performance is significantly improved with the application of double-panel partition system
A systematic approach is proposed to model the gear whine noise generation by considering the hypoid gear mesh via the tooth contact analysis and the subsequent system dynamic effect by modeling the shaft-bearinghousing-axle components
Summary
There are several noise sources inside a vehicle cabin, such as engine, tire-road, wind, and various electrical components. Yang et al [21,22,23] further investigated the nonlinear dynamic behavior of hypoid gearbox considering a time-varying bearing stiffness and extended to emphasize the whole driveline system by coupling the elastic housing and propeller shaft components. In spite of these promising successes on the studies of the dynamic analysis of hypoid geared rotor system, there is no reported literature on the systematic study by combing the gear tooth contact analysis all the way down to the vibroacoustic analysis to evaluate and control the radiated axle whine noise.
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