Finite Element modeling of force amplification at the spindle due to a tire's cavity mode: experimental verification

Reduction of tire-road noise is an important issue when developing luxury cars and electric vehicles. In this context, the air-cavity mode source spindle forces transmitted to suspension that then increase interior levels. When a tire rotates, cavity near 200 Hz splits into two adjacent modes due Doppler effect deformation. That split can lead increased levels both longitudinal vertical at since acoustic each contribute rotates. Thus, it develop tools identify contributions force. A FE simulation force for steady-state rolling has been verified by comparison with laboratory test results obtained using wheel-force transducer mounted on Purdue's Tire Pavement Test Apparatus. It was observed frequency expands as rotation speed increases aligned odd-numbered circumferential structural mode. By correlated model, parametric studies have carried out focused minimizing Hz.