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Abstract
AbstractThe understanding of NVH problems in brake systems becomes a strongly dominant remit in modern days. Finding solutions is the central task to achieve a calm and smooth system behavior.Brake squeal on automotive disk brakes represents a high frequency noise phenomenon resulting in potential customer complaints. The avoidance of squeal causes high costs in the automotive industry worldwide. One countermeasure for this disruptive noise issue is the application of thin composites named shims bonded to back plates of brake pads. The selection of appropriate shims is according to the state of the art still mainly based on trial and error. Current approaches seem to map the effects of shims on brake squeal insufficiently. To describe the shim behavior in an improved manner, prior experimental investigations have to be carried out, focusing on the identification of modal damping and stiffness values.The contribution shows experimental results of shims firmly bonded to brake pads and rectangular steel plates. Temperature variations and the analysis of nonlinearities like various excitation levels are examined in greater detail. As a result, the general influence of shims is presented and compared to measurements without damping materials. (© 2017 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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