摘要：Recent experimental results have shown that the vibration induced by the tire
air cavity resonance is transmitted into the vehicle cabin and may be
responsible for significant interior noise. The tire acoustic cavity is
excited by the road surface through the contact patch on the rotating tire.
The effect of the cavity resonance is that results in significant forces
developed at the vehicle’s spindle, which in turn drives the vehicle’s interior
acoustic field. This tire-cavity interaction phenomenon is analytically
investigated by modeling the fully coupled tire-cavity systems. The tire is
modeled as an annular shell structure in contact with the road surface. The
rotating contact patch or a harmonic point force is used as a forcing
function in the coupled tire-cavity governing equation of motion. The contact
patch is defined as a prescribed deformation that in turn is expanded in its
Fourier components. The response of the tire is then separated into static
and dynamic components. The coupled system of equations is then solved in
closed form in order to obtain the tire acoustic and structural responses.
The influence of the acoustic cavity resonance on the spindles forces
is shown to be very important. Therefore, the tire cavity resonance effect
must be reduced in order to control the tire contribution to the vehicle
interior noise. The modeling and analysis of an approach to control the tire
acoustic cavity resonances is investigated. The approach consists in the
incorporation of secondary acoustic cavities to detune and damp out the
main tire cavity resonance. The model is used to show that the secondary
cavities are effective at suppressing the tire cavity resonance and thus the
forces at the spindle.
