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Investigation of Noise and Vibration in Tires Through Analytical Modeling, Tests and Simulations

机译：通过分析模型，测试和仿真研究轮胎的噪声和振动

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摘要

Tire noise and vibration is an interesting topic, with more and more people paying attention to this issue. Tire noise can both propagate into the vehicle interior and radiate directly toward the immediate environment. Tire noise is not only related to vehicle passengers' comfort but also affects the residential or working area near highways, especially in high population density regions. The emerging electric vehicles also emphasize tires' role in vehicle Noise Vibration and Harshness (NVH) since power-train noises are significantly reduced. The study in this research focuses on the noise and vibration of tires from the low to high frequency range, typically from 60 kHz to 2 kHz. From the analytical point of view, forced vibration of a fully coupled 2D structural-acoustical model is presented and a 3D structural model is also investigated for various input conditions. Both circumferential and cross-sectional shearing motions in the analytical tire models can be observed. Static tire surface mobilities were also measured to verify the findings from the developed models. On the experimental side, the loading effect on tire noise radiation was studied, where applied loads ranged from 500 lbs to 1300 lbs. Results indicate that sound radiation is usually proportional to the loading, except between 1.1 kHz to 1.7 kHz where the load-noise relation is reversed. In addition, tire noise generated by road surface discontinuities was also studied experimentally. As expected, a broadband increase of the noise spectrum can be observed below 1 kHz compared to the noise on a continuous surface. However, the difference tends to diminish above 1 kHz except in a certain narrow frequency band depending on the particular tire tested. High frequency waves and motions in tire cross-sectional directions were identified as occurring in the frequency range of interest. A two-dimensional cross-sectional analytical tire model was proposed for further investigations, in order to verify the relation among high frequency tire noise properties and the fast propagating waves and cross-sectional motions in tires. Finally, a fully coupled finite element tire-wheel model was developed to simulate the tire deformation under static vertical loading and to explore the influence of various excitation forces. The forces or accelerations, depending on the boundary conditions, at the wheel center can be calculated from the tire model up to 500 Hz. The results can be potentially used as input for vehicle full body simulations, thus accelerating the optimization process of new product development.
机译：轮胎的噪音和振动是一个有趣的话题，越来越多的人关注这个问题。轮胎噪声既可以传播到车辆内部，也可以直接向周围环境辐射。轮胎噪音不仅与车辆乘客的舒适感有关，而且还会影响高速公路附近的住宅区或工作区，尤其是在人口密度高的地区。新兴的电动汽车还强调了轮胎在车辆噪声振动和苛刻性（NVH）中的作用，因为动力传动系统的噪声已大大降低。这项研究的重点是从低频到高频范围（通常为60 kHz至2 kHz）的轮胎噪声和振动。从分析的角度来看，提出了完全耦合的2D结构-声学模型的强制振动，并针对各种输入条件研究了3D结构模型。可以在分析轮胎模型中观察到圆周和横截面的剪切运动。还测量了静态轮胎表面流动性，以验证开发模型的发现。在实验方面，研究了负载对轮胎噪声辐射的影响，其中施加的负载范围为500 lbs至1300 lbs。结果表明，声辐射通常与负载成正比，但在1.1 kHz至1.7 kHz之间，负载噪声关系相反。另外，还对由路面不连续产生的轮胎噪声进行了实验研究。如所预期的，与连续表面上的噪声相比，在1 kHz以下可以观察到噪声频谱的宽带增加。但是，根据测试的特定轮胎，除了在一定的窄频带内以外，该差异往往会在1 kHz以上减小。高频波和轮胎横截面方向的运动被确定为在感兴趣的频率范围内发生。为了验证高频轮胎噪声特性与轮胎中的快速传播波和横截面运动之间的关系，提出了二维横截面分析轮胎模型以进行进一步研究。最后，建立了一个完全耦合的有限元轮胎-车轮模型，以模拟静态垂直载荷下的轮胎变形并探索各种激励力的影响。取决于边界条件，可以根据高达500 Hz的轮胎模型计算出车轮中心处的力或加速度。结果可以潜在地用作车辆全身模拟的输入，从而加快新产品开发的优化过程。

著录项

  • 作者

    Cao, Rui.;

  • 作者单位

    Purdue University.;

  • 授予单位 Purdue University.;
  • 学科 Mechanical engineering.;Acoustics.
  • 学位 Ph.D.
  • 年度 2017
  • 页码 172 p.
  • 总页数 172
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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