On the relationship between the vibration characteristics of the automobile wheel and generated road noise in the vehicle cabin

The relationship between vibration characteristics of an automobile wheel and the generated road noise in the vehicle cabin was investigated experimentally and numerically because it is one of the vibration transmission paths caused by the input force from roads. Experiments were conducted using 15-inch wheels in two different vibration characteristics, and the results were discussed based on the measurements of the noise in the cabin and vibrational acceleration of the sub-frame of the vehicle when driving on smooth and rough roads at a speed of 30 km/h. Further, transient analysis using FEM was also performed using a tire-wheel assembly model. The results showed that large differences were observed in the generated noise of 49, 90, and 167 Hz in the case of the smooth road, and these differences were due to the difference in the magnitude of vibrational accelerations of the wheel at these frequencies.