Study on the vibration and sound field radiated by a tire utilizing finite element method and boundary lernent method
SHI Huan-wen1, CHEN Ji-Chuan2, WANG Jin-guo1, XU Chun-long1, WEI Jun-bo1
(1 College of Science, Chang′an University, Xi′an 710064, Shaanxi, China;2 No.2 Comprehensive Geophysical Explortion Team, Shaanxi Bureau of Geology, Xi′an 710016, Shaanxi, China)
Abstract:
In order to investigate the characteristics of the sound field radiated by a vibrating tire, a finite element method (FEM) model of a tire with type P215/70R14 is built on the basis of geometrical and material parameters measured by others. After the modal analysis results is put into BEM code, the radiation efficiency, radiation power, square mean root vibration velocity on surface, normal sound intensity at driving point and sound directivity pattern are computed. The results show that the sound fields on the yOz plane radiated by the tire at frequencies of 61 Hz approaches dipole′s field, and those at frequencies of 451 Hz approaches quadrupole′s field, but they tends to complexity with the increase of frequency above 451 Hz. This method can lay a foundation for further computing noise radiated by a tire under real driving conditions.
KeyWords:
tire;sound radiation;finite element method(FEM);boundary element method(BEM)
