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Tread Discontinuities as Source of Vibration/Noise -Transient Dynamics of Rolling Tire

机译：胎面间断作为振动/噪声的来源-滚动轮胎的瞬态动力学

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摘要

Tire vibrations supply energy for noise generation. Tread band features, such as grooves and blade cuts, affect noise signatures since they impart vibrations to a rolling tire. Finite element transient dynamics simulations have been performed with ABAQUS/Explicit on a rolling passenger tire to examine the vibrations induced by the entrance of tread pattern discontinuities into the contact patch. The loaded tire rolls on a 3.05 m (10 ft) diameter drum at terminal speeds of 4.3 km/h (2.7 mph) and 34.4 km/h (21.4 mph). Three models with augmented discontinuities in the circumferential ribs have been examined: 1) continuous (control); 2) angled lateral grooves; and 3) transverse grooves. They are ordered in increasing severity of rib discontinuity. The induced rolling vibrations are evaluated by identifying the 'perturbed' dynamic responses of (2) and (3) from (1). The results indicate that any discontinuity or abruptness in tread patterns can induce vibrations, which are similar in nature, for the two speeds studied. The higher rolling speed changes only the amplitudes, but not the frequencies of the induced oscillations at the free spindle. The 'perturbed' vibrations for both speeds manifest at the spindle as translational (vertical) and rotational (axial) oscillations of 29 and 44 Hz, respectively, for the tire studied.
机译：轮胎振动为产生噪音提供能量。胎面花纹的特征（例如凹槽和锯齿状切口）会影响噪音，因为它们会给滚动轮胎带来振动。已经用ABAQUS / Explicit在滚动的乘用轮胎上进行了有限元瞬态动力学仿真，以检查由胎面花纹不连续性进入接触补片引起的振动。装载的轮胎在直径为3.05 m（10英尺）的鼓上滚动，终端速度为4.3 km / h（2.7 mph）和34.4 km / h（21.4 mph）。检验了三个模型，这些模型在圆周肋中具有增加的不连续性：1）连续（对照）; 2）倾斜的横向凹槽; 3）横向槽。它们以肋骨不连续的严重性增加的顺序排列。通过识别（1）中（2）和（3）的“摄动”动态响应，可以评估诱发的滚动振动。结果表明，在所研究的两种速度下，胎面花纹的任何不连续或突然变化都可能引起本质上相似的振动。较高的轧制速度只会改变振幅，而不会改变自由主轴上的感应振动的频率。对于所研究的轮胎，两种速度的“摄动”振动分别在主轴上表现为29 Hz和44 Hz的平移（垂直）振动和旋转（轴向）振动。

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