Estimation method of input power from road to tire based on experimental SEA
* Presenting author
A tire is a composite structure and a viscoelastic body, and its mode density is high. Then, strict methods such as Finite-Element-Method are difficult to apply. Under the circumstances, the authors are conducting research for predicting tire vibration and noise using Statistical-Energy-Analysis based on the energy propagation. The mechanism of tire vibration and noise goes through three processes of input, propagation and radiation. Initial examination of Experimental SEA model construction method and input power evaluation methods is to be conducted for propagation and input based on SEA theory. In this report, the authors first propose a method to estimate the input power from the road surface. For the problem of the subdivision in estimation input power, we established a method to make the experimental SEA models a total of two subsystems, one for each tread and one for each sidewall. Furthermore, we showed that the input power becomes constant regardless of the subdivision angle. For the subsystem energy, a tri-axial accelerometer was installed inside the tread and outside of the sidewall, the response acceleration when rolling on a tire tester was measured, and it was calculated by FFT.