Influence of the Side Branch Structure Pattern of the Imitation Cat's Claw Function on the Vibration and Noise of Tires
Keywords:bionics, vibration damping mechanism, vibration noise, tread pattern, structural design
To study the method of reducing the low-frequency vibration noise of the tire, a passenger car tire(205/55R16) is taken as the research object. The dynamic grounding characteristics and vibration reduction mechanism of the cat's paw pad are analyzed. The research showed that the swing deformation characteristics of paw pads during the walking process of cats is one of the main ways to reduce the impact from the ground and achieve vibration reduction and silencing. To analyze the influence of tire grounding on noise, the tire grounding is divided into five areas, and the characteristics of ten tire grounding areas are analyzed through tests. Pearson correlation analysis is used to obtain the characteristics of the eight most relevant grounding areas with tire noise, and multiple linear regression is conducted between the characteristics of the eight grounding areas. The product of the correlation coefficient and the average value of the characteristics of the ground contact area shows that the central area of the tire tread contributes the most to the tire noise. The swing deformation characteristics of the bionic cat paw pad are realized by setting the staggered side branch pipe groove in the center of the tire, and the vibration reduction characteristics of the bionic tire are analyzed by using the finite element method. The results showed that when the tire rolls, the amplitude and fluctuation range of the ground radial excitation force acting on the bionic tire are reduced compared with the original tire, and the vibration and noise characteristics of the tire are improved.
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