High-frequency tire noise is radiated primarily by tread vibration excited by abrupt contacts of tread rubber and road surface shingles. To know the excitation power of each contact occasion and the interferences between adjacent contacts, a dynamical simulation model was developed. As the basis of the model, measurements of intrusion depth, deformation around the contact point and accompanying thrust were conducted using a steel ball as a shingle model. The, finite element model of this contact phenomenon includes non-linear contact elements. Using this model, we will be able to calculate influences of tread material properties and shingle dimensions on excitation force character.
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