Experimental Identification of Brake Pad Material Properties—A Step Towards a Better Prediction of Brake Squeal
Experimental Identification of Brake Pad Material Properties—A Step Towards a Better Prediction of Brake Squeal
复制标题
刹车片材料特性的实验鉴定——更好地预测刹车尖叫的一步
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
U. Wagner
中科院分区：
文献类型：
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作者：
S. A. Hornig;D. Hochlenert;U. Wagner
汽车制动尖叫声是由制动系统的摩擦诱导自激振动产生的破坏性高频声辐射现象。制动系统失去其稳定性，并开始在极限环中振荡，其振幅受到非线性的限制，非线性的主要来源是制动衬片材料。为了使用已建立的数学-力学模型进行可靠的制动尖叫预测，了解衬片材料的特性非常重要。本文论述了衬砌材料性能的试验鉴定，特别是弹性性能的试验鉴定。由于这些强烈地取决于制动系统的操作条件而变化，因此有必要在实验设置中尽可能接近地再现制动尖叫期间的操作条件。在这方面，一个特殊的试验台，测试数据评估和实验确定的非线性弹性制动衬片的性能。假设这些制动衬片的属性是突出的非线性源，非线性稳定性分析进行了一个现实的盘式制动器模型。制动尖叫的结果进行了讨论，而从制动系统的操作经验已知的基本现象可以解释的基础上，这种分析。
Automotive brake squeal is a disruptive high frequency sound radiation phenomenon generated by friction‐induced self‐excited vibrations of the brake system. The brake system loses its stability and starts oscillating in a limit cycle with amplitudes limited by nonlinearities, the main origin of the nonlinearities being brake lining material. In order to perform a reliable brake squeal prediction using established mathematical‐mechanical models, the knowledge of the lining material properties is of great importance. The present paper deals with the experimental identification of lining material properties, expecially referring to the elastic properties. Since these strongly vary depending on the operating conditions of brake systems, it is necessary to reproduce the operating conditions during brake squeal as close as possible in experimental setups. In this context a special test rig, the test data evaluation and the experimentally determined nonlinear elastic brake lining properties are presented. Assuming these brake lining properties to be the prominent source of the nonlinearity, a nonlinear stability analysis is performed on a realistic disk brake model. The results referring to brake squeal are discussed, whereas basic phenomena known from operating experience of brake systems can be explained on the basis of this analysis.