Abstract
The dynamic behaviour of rolling tyres is becoming relatively important in the prediction of vehicle ride vibration, especially for those un-suspended vehicles. Attention has been paid to the vertical tyre behaviour for many years and many measured data have been published. However there is a lack of knowledge about the dynamic behaviour of rolling tyres in the lateral direction and a shortage of the measured data of lateral vibration properties of tyres. This paper described the use of a purpose built dynamic tyre testing vehicle to measure lateral dynamic behaviour of a rolling tyre. The measured results showed a difference of 20% to 80% in the lateral frequency response between a rolling tyre and non-rolling tyre. The measurements also showed that the lateral excitation induced by the tyre lugs causes non-linearity in the frequency at a frequency given by the tyre lug spacing and travel speed.
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