6. ACOUSTIC ANALYSIS OF ROLLING TIRE FINITE ELEMENT METHOD

In the automotive sector, tire noise has a significant impact on Driving comfort and noise pollution. During the movement of a vehicle, tire noise mainly arises due to interaction between tire tread and road surface. Tire pattern, tire type, road surf ace condition and driving are few of the elements affecting tyre noise. Tyre noise tends to grow with increasing vehicle speed and is also related to uneven or rough road surfaces. The acoustic analysis of rolling tyres using the finite element method (FEM) is the main component of this research.It comprises of several simulation sound radiation processes, starting with the development of a half-model of a two- dimensional axisymmetric tyre and the application of section material properties and boundary conditions. Next, this model was rotated around any reference axis to create a dimensional tyre. Any reference plane is reflected by this 3D tyre in order to create a full 3D tyre, and boundary conditions such as axel load tyre inflation pressure are applied. Foot print analysis of tire. After completion of foot print analysis Tire under steady state dynamic analysis in this step tire rolling different speed and applying harmonic excitation and extract the frequency response and modal analysis of rolling tire. Acoustic simulation is a last step of analysis create air cavity surrounding of tire and analyze sound pressure level (SPL) at different speed.