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A coupled tire structure-acoustic cavity model.

机译：耦合的轮胎结构-声腔模型。

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摘要

Recent experimental results have shown that the vibration induced by the tire air cavity resonance is transmitted into the vehicle cabin and may be responsible for significant interior noise. The tire acoustic cavity is excited by the road surface through the contact patch on the rotating tire. The effect of the cavity resonance is that results in significant forces developed at the vehicle's spindle, which in turn drives the vehicle's interior acoustic field. This tire-cavity interaction phenomenon is analytically investigated by modeling the fully coupled tire-cavity systems. The tire is modeled as an annular shell structure in contact with the road surface. The rotating contact patch is used as a forcing function in the coupled tire-cavity governing equation of motion. The contact patch is defined as a prescribed deformation that in turn is expanded in its Fourier components. The response of the tire is then separated into static (i.e. static deformation induced by the contact patch) and dynamic components due to inertial effects. The coupled system of equations is solved analytically in order to obtain the tire acoustic and structural responses. The model provides valuable physical insight into the patch-tire-acoustic interaction phenomenon. The influence of the acoustic cavity resonance on the spindles forces is shown to be very important. Therefore, the tire cavity resonance effect must be reduced in order to control the tire contribution to the vehicle interior. The analysis and modeling of two feasible approaches to control the tire acoustic cavity resonances are proposed and investigated. The first approach is the incorporation of secondary acoustic cavities to detune and damp out the main tire cavity resonance. The second approach is the addition of damping directly into the tire cavity. The techniques presented in this dissertation to suppress the adverse effects of the acoustic cavity in the tire response, i.e. forces at the spindle, show to be very effective and can be easily applied in practice.
机译：最近的实验结果表明，由轮胎气腔共振引起的振动被传递到车厢内，并可能导致明显的内部噪音。轮胎声腔通过旋转轮胎上的接触面被路面激发。空腔共振的作用是导致在车辆主轴上产生很大的力，进而驱动车辆的内部声场。通过对完全耦合的轮胎-空腔系统进行建模，可以分析研究这种轮胎-空腔相互作用现象。轮胎被建模为与路面接触的环形壳结构。旋转接触面片在耦合的轮胎型腔控制运动方程中用作强制函数。接触贴片定义为规定的变形，该变形继而在其傅立叶分量中扩展。然后，由于惯性效应，轮胎的响应分为静态（即，由接触斑引起的静态变形）和动态分量。方程的耦合系统通过解析求解，以获得轮胎的声学和结构响应。该模型为斑块-轮胎-声音相互作用现象提供了宝贵的物理见解。声腔共振对主轴力的影响非常重要。因此，必须减小轮胎空腔共振效应，以便控制轮胎对车辆内部的影响。提出并研究了两种控制轮胎声腔共振的可行方法的建模。第一种方法是并入辅助声腔，以失谐和衰减主轮胎腔共振。第二种方法是将阻尼直接添加到轮胎腔中。本文提出的抑制声腔对轮胎响应的不利影响的技术，即在主轴上的力，显示出非常有效的方法，并且很容易在实践中应用。

著录项

  • 作者

    Molisani, Leonardo.;

  • 作者单位

    Virginia Polytechnic Institute and State University.;

  • 授予单位 Virginia Polytechnic Institute and State University.;
  • 学科 Engineering Mechanical.
  • 学位 Ph.D.
  • 年度 2004
  • 页码 181 p.
  • 总页数 181
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 机械、仪表工业;
  • 关键词

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