Abstract
As a kind of low-frequency vehicle interior noise, tire acoustic cavity resonance noise plays an important role, since the other noise (e.g., engine noise, wind noise and friction noise) has been largely suppressed. For the suspension system, wheels stand first in the propagation path of this energy. Therefore, it is of great significance to study the influence of wheel design on the transmission characteristics of this vibration energy. However, currently the related research has not received enough attention. In this paper, two sizes of aluminum alloy wheel finite element models are constructed, and their modal characteristics are analyzed and verified by experimental tests simultaneously. A mathematically fitting sound pressure load model arising from the tire acoustic cavity resonance acting on the rim is first put forward. Then, the power flow method is applied to investigate the resonance energy distribution and transmission characteristics in the wheels. The structure intensity distribution and energy transmission efficiency can be described and analyzed clearly. Furthermore, the effects of material structure damping and the wheel spoke number on the energy transmission are also discussed.
Highlights
Tire acoustic cavity resonance (TACR) noise is well known for its large effect on vehicle ride comfort
The power flow method, when first used in in the the investigation investigation of of energy energy transmission transmission characteristics characteristicsin inwheels, wheels,isishelpful helpfulto tothe the quantitative description of energy propagation; quantitative description of energy propagation; 2
The distribution of TACR energy during propagation was different for different structures of wheels, and the values of the input and output power flows varied greatly
Summary
Tire acoustic cavity resonance (TACR) noise is well known for its large effect on vehicle ride comfort. Researchers have found a distinct peak in the frequency spectrum of interior noise that coincides with the natural frequency of the tire acoustic cavity [1,2,3]. In respect to noise reduction, previous studies mostly used sound absorbing materials, resonators or damping structures to suppress the resonance [8,9,10]. Haverkamp [11] found that filling the tire cavity with mineral fibers could reduce the noise sound pressure level by. 20 dB, while Fernandez [12] studied the noise reduction effects of various sound-absorbing materials including fabric fibers and aluminum foam. Kamiyama [13] used a Helmholtz resonator to dissipate the resonance energy and applied the device to industrial models
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