Disc brake squeal is a very complicated phenomenon, and the influence of insulators in suppressing squeal is not fully understood. The aim of this paper is increase the understanding of the effect of insulators. A previous paper [1] presented an experimental technique for measuring the frequency- and temperature- dependent properties of viscoelastic materials currently used in insulators. The present work continues by considering the coupled vibrations of the brake pad and insulator. A comparison of natural frequencies found from experimental modal analysis and finite element modeling indicates agreement to with 5%. Experimentally determined modal loss factors of the brake pad vary dramatically with frequency, changing by a factor of 2 over the frequency range 2-11 kHz. A method for including this frequency dependence, as well as the frequency dependence of the insulator material, in state-of-the-art finite element software is proposed. This method uses forced response vectors from the complete frequency-dependent model to construct a reduced-order model with frequency-independent matrices. Agreement between the complete and reduced models is analytically guaranteed and numerically observed at a number of frequencies in the band of interest.


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    Title :

    Simulating the Effect of Insulators in Reducing Disc Brake Squeele


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    23rd Annual Brake Colloquium and Exhibition ; 2005



    Publication date :

    2005-10-09




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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