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Abstract:The experimental analysis of a single component of a brake system and an assembly consisting of three components is used to clarify the relevance of joints in terms of damping and nonlinearity in state-of-the-art brake systems. For this purpose a series of experimental modal analyses is conducted. A comparison of the results obtained from the single component and of the assembly strongly indicate that the joints which necessarily exist in an assembled structure have an impact on the dynamic behaviour of the structure. The modal damping values of the jointed structure are up to factor sixty higher than those of the single component values. Also, a significant amplitude dependency of the frequency response functions is visible. These observations demonstrate that joints are a major source of energy dissipation in friction brake systems and, in addition, that they introduce nonlinear behaviour to the system which has the potential to limit squeal amplitudes. Therefore, mechanical joints in brake systems should be considered as decisive design elements for noise-vibrationharshness (NVH) issues in brakes.http://mc.manuscriptcentral.com/jauto 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w brake systems and, in addition, that they introduce nonlinear behaviour to the system which has the potential to limit squeal amplitudes. Therefore, mechanical joints in brake systems should be considered as decisive design elements for noise-vibration-harshness (NVH) issues in brakes.