Investigation of Tyre Acoustic Cavity Mode Induced In-Cabin Noise

In-cabin noise induced by tyre air cavity resonance is one of the major issues among other sources. Introducing foam in cavity or changing tyre cavity design is expensive and sometimes they may not solve the problem. Most of the cases the intended techniques are difficult to implement. There are several factors which can affect the tyre cavity resonance. In this work we have studied the effect of acoustic and structural coupling of tyre wheel assembly on tyre cavity resonance. The modal testing of tyre wheel assembly and rim reveals that wheel rim mode affects the tyre cavity resonance. Shifting wheel rim mode away from air cavity mode by using lighter wheel rim reduces the In-cabin noise due to air cavity resonance. Later air cavity resonance mechanism is simulated and verified with the modal test results. In-cabin noise due to air cavity resonance can be optimized by means of using this validated numerical simulation method in the early design stage of tyre development.