en موتور احتراق داخلی Internal Combustion Engines (ICE, ...) پژوهشي Research The natural frequencies and mode shapes of pneumatic tires are predicted using a geometrically accurate, three-dimensional finite element modeling. Tire rubber materials and cord layers are represented independently using “shell element” available in COSMOS. The effects of some physical parameters such as the inflation pressure tread pattern, thickness of belts and ply angles to the natural frequencies of tires are investigated. By imposing equivalent centrifugal forces, the effect of translational speed on vibrating behavior of the tire is also studied in this work. Comparisons of numerical and experimental results are given to show the validity of the proposed model. free vibration, natural frequencies, tire, FEM, shell element. 827 833 http://ase.iust.ac.ir/browse.php?a_code=A-10-63-82&slc_lang=en&sid=1 M. Namjoo 180031947532846001104 180031947532846001104 Yes H. Golbakhshi 180031947532846001105 180031947532846001105 No