Abstract
As we all know, the tire acoustic cavity resonance noise (TACRN) can cause irritating noise in a vehicle, but it is evidently difficult to be weakened. To obtain accurately the characteristics of TACRN is a key step of attenuating TACRN. In this paper, a simulation method, in which a simplified finite element model of automobile tire with acoustic cavity introducing the rotation of automobile tire is established, is proposed to gain the sound field in the cavity of a rotating automobile tire. And the test of sound pressure in a rotating tire is also performed to validate the proposed simulation method. The comparisons between the simulation and experimental consequences show a satisfying conclusion. Furthermore, the influence factors of the rotating speed, the inflation pressure of the tire and the load on the sound field of automobile tire acoustic cavity are calculated and analyzed.
Highlights
The noise emission is due to rolling and the air that expands behind the tire and is radiated noise outside the tire, and the research of this paper is the acoustic cavity resonance noise enclosed by the tire and wheel rim
A simulation method introducing the equivalent rotating condition is proposed to evaluate the sound field in rotating automobile tire cavity
The simulation consequences under different operational conditions are verified by experiments, and the comparison between the test and simulation consequences demonstrate that the simulation means provide a valid and correct tool for forecasting the sound field in the rotating tire
Summary
To fully understand the characteristics of TACRN is a key step of attenuating TACRN To this aim, many researchers have performed a series of investigations, especially in building tire simulation models with acoustical cavities and the influences of load and velocity on TACRN. The current simulation software has certain limitations in dealing with the rotating effect of the tire and cavity Aiming at these problems, the finite element model (FEM) of a tire coupling with the inside acoustic medium is established in terms of the real tire firstly. The influence of tire compound, the tread pattern, wear and usage time on noise is not considered, since the influence of these factors on tire acoustic cavity resonance noise is more complex and the simulation analysis is more difficult These works are helpful to understand accurately the characteristics of TACRN
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