ANALYSIS OF POTENTIAL SOLUTIONS TO AUDIBLE TIRE CAVITY AND RIM COUPLING RESONANCE NOISE

摘要

The coupling of the tire cavity and tire rim resonance imparts aforce upon the wheel spindle which is transmitted to the vehicleinterior to produce undesirable noise levels. Modifications tothe tire rim or tire cavity can decouple these resonances byshifting the natural frequency outside of the 200 – 250 Hz rangeto reduce the audible noise levels. Through experiment andanalysis several potential solutions have been compared fortheir commercial viability. Modifications of the rim includedthe Kühl wheel design and the implementation of a Helmholtzresonator, whilst tire cavity modifications included the extrusionof rubber from the tire into the cavity, the introduction of asound absorption material and an elastic ring with separator finswhich extends into the cavity due to centrifugal forces.Through QFD analysis the elastic ring design was found to bemost commercially viable in terms of performance, cost, safety,versatility, durability and manufacturing readiness.