Abstract
The major source of environmental noise exposure is road traffic noise. Of all noise sources, tyre rolling noiseis dominant for speeds above 30 km/h for passenger cars. Tyre rolling noise can be subdivided into interiorand exterior noise. For the interior noise to which the passengers are exposed to, the tyre transmissibilityis essential since it relates the contact forces with the axle forces. These axle forces are responsible for thestructure borne interior noise. Here, a Finite Element tyre model, including a fully coupled air column, is usedto examine the transmissibility in the frequency domain 0-300 Hz. It is shown that three aspects are essentialin modeling the axle forces resulting from tyre-road interaction: 1) the tyre deformation since it leads to aset of non-axisymmetric eigenmodes, 2) the relatively low-damped non-axisymmetric acoustic resonance, and3) rotation. A methodology using substructuring techniques is presented to include rotational effects both inthe case of an undeformed and deformed tyre. These effects of rotation on the transmissibility differ in thedeformed and undeformed case: frequency loci veering occurs in the deformed case, while in the undeformedcase rotation results in a pure split of the eigenfrequencies.
Original language | English |
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Title of host publication | Euronoise 2008 |
Place of Publication | France, Paris |
Publication status | Published - 2008 |