Effects of Rotation on the Tire Dynamic Behavior: Experimental and Numerical Analyses
Based on the results of experimental and numerical analyses, we investigate the effects of rotation on tire dynamic behavior. Better understanding of these effects will further improve the ability to control and optimize the noise and vibrations that result from the interaction between the road surface and the rolling tire. The presented work was performed in the framework of the European industry-academia project Tire-Dyn, with partners Goodyear, Katholieke Universiteit Leuven, and LMS International. The effect of rotation on the tire dynamic behavior is quantified for different operating conditions of the tire, such as load and rotation speed. Through combined experimental and numerical analyses, the physical phenomena accounting for the observed rotation influences are described.ABSTRACT
Typical dispersion curves corresponding to different wave types that propagate in an unloaded and nonrotating tire (based on Bolton and Kim [ 13 ]).
Simulated frequency–wave number plots (dB) of the unloaded tire for different speeds. The positive wave numbers correspond to waves traveling in the tire rotation direction, and negative wave numbers to waves traveling in the direction opposite the tire rotation.
Numerically predicted modal parameters of the unloaded, nonrotating, and rotating tire (60 and 100 kph) with inflation pressure 2.2 bar. The solid arrows indicate the tire rotation direction, while the thin arrows indicate the direction of the traveling wave.
Shift on some of the natural frequencies (mode [2 ,0], [4, 0], [6, 0] and first acoustic mode) of the rotating tire as a function of speed.
Experimental frequency–wave number plots (dB) for speeds 40, 60, and 80 kph. The positive wave numbers correspond to waves traveling in the tire rotation direction, and negative wave numbers to waves traveling in the direction opposite the tire rotation.
Experimentally identified mode shapes of the considered tire at the following conditions: 60 kph, cleat 3 × 25 mm, 4000 N, 2.2 bar. The solid arrows indicate the tire rotation direction, while the thin arrows indicate the direction of the traveling wave.
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