Automobile manufacturers are faced with a strong requirement today for developing high-quality vehicles in a short period of time. Since Noise, Vibration and Harshness (NVH) is one of the vehicle quality measurements, the demand increases forbetter vehicle sound quality. The noise generated from the tires is becoming one of the major sources in traffic noise, since engine noise is continuously being reduced by vehicle manufactures. Therefore, the development of analysis tools of the tire/road noise component has been seriously desired. The analysis of pneumatic tires represents one of the most formidable challenges in structural analysis. In addition to the harsh environment to which automotive tires are subjected, several other factorscontribute to the difficulty of constructing mathematical models for tires. The tire is a composite structure consists of rubber-textile constituents which exhibit anisotropic and nonhomogeneous material properties. Large deflection, frictional contactand highly nonlinear material behavior make the development of practical tire analysis tools extremely difficult. The model used in this work for predicting the elastic constants of multi-ply (laminate) cord-rubber composites is based on representing one or several layers separately in conjunction with the corresponding rubber elements [1]. This technique is adopted from the rebar element concept which has been applied in reinforced concrete structures since many years [2]. The tire noise prediction system, which is the goal of AVL, is based on coupling a finite element method (FEM) and a boundary element method (BEM). The finite element method is used to calculate the surface velocity of the rolling tire and the boundaryelement program is used to compute the acoustic pressure and intensity in the air caused by this vibrations.
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