Abstract: When the air in the cavity of the tire is excited by the road surface, it produces resonance in a specific frequency range. The resonance is transmitted to the cab through the axle and body structure, and then forms low-frequency noise in the car, which seriously affects the NVH characteristics of the car. In this paper, 205/55R16 passenger car tire is taken as the research object, studied the relationship between tire force transmissibility and tire cavity resonance noise, and proposed the viewpoint that the amplitude of tire force transmissibility is used to characterize the noise intensity of tire resonance cavity. On this basis, established the simulation model of tire force transfer rate, The tire cavity resonance noise is reduced by reducing the amplitude of tire force transfer rate. The effects of density, elastic modulus, width and thickness of porous materials on the amplitude of tire force transmissibility were investigated by using the optimal Latin hypercube test method and Kriging approximation model. By changing the width parameter of porous material, the accuracy of simulation results is verified through tire force transfer test and drop noise test. With the help of multi island genetic algorithm, the optimal design parameters of porous materials are obtained. Through analysis, compared with the original tire, the amplitude of force transmissibility of the optimized tire is significantly reduced, and the cavity resonance noise of the tire is also effectively improved.
 

tire cavity, noise reduction, porous material, numerical simulation