چكيده به لاتين
Nowadays, the issue of noise and annoying sounds is a major challenge through design of vehicles. Noise emitted from tire-road interaction shall be considered as a problematic issue in this regard. In the current study, a brief review of tire , tire-road interaction noise, its sources and the mechanisms through which disturbing sounds are generated from tire, are presented. Moreover, progress in accurate evaluation of noise emitted from tire, methods of tire noise reduction, modeling, acoustic analysis and the effect of tread in the noise generation have been investigated. Followed by structure design and materials selection for different parts of tire, modeling and simulation were performed using related software tools and factors of noise generation as well as the ensued effects were studied. By focusing on the obtained results of tire contact with road surface, vibrational analysis and determination of tire eigenvalues, effect of tire tread pattern as an influencing factor on sound pressure level has been investigated. The acoustic analysis of tire-road interaction noise was studied through practice of Finite Element Method in a frequency domain from 0 to 1200(Hz) and then the tire tread pattern was optimized using Genetic Algorithm and Tire Step Noise Theory. By re-performing the acoustic analysis on the optimized tread pattern within the desired frequency range, the results of the acoustic analysis were presented and the value of sound pressure level resulting from the optimal pattern was compared to the main model. The optimization of tire tread pattern showed a decrease value of 1.73 dB in the sound emitted through the frequency limited range of about 900 Hz during tire rolling at a specified speed.
