Disc brake squeal is an everlasting problem in industry and academia and an important topic in the field of friction induced vibrations. Works regarding brake noise mainly focus on the core parts of the brake system such as disc, pads and calliper. But it is widely known that brake squeal is an issue concerning more than these inner components. Nowadays, more and more complex axle setups are generated to deal with the different conditions a vehicle is designed for. Hence, one brake may be combined with a wide variety of axle setups in order to fulfil the different requirements of various cars using the same brake. This situation causes an immense effort in terms of NVH development. This work analyses the role of axle components for disc brake noise. It shows schematically the way these components influence the comfort characteristics of a brake system and presents simulation based evidence that axle components can have a considerable influence on brake noise. In this work a standard method for the evaluation of the influence of components on instabilities was evaluated with a special focus on axle components. The possibility and limits of contribution and participation factors are presented. Two cases are discussed where the method fails. The limits of the methods are pointed out and a mathematical solution of the problem is suggested by derivation of the left and right eigenproblem. This mathematical method can be a possible tool in the future that might be implemented in standard software in order to enable design engineers to chose a variation of the best suitable components or component parameters in order to solve stability problems. It seems to be necessary to solve the left and the right eigenproblem in future in order to develop more sophisticated tools for NVH-engineers.


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    Title :

    The influence of axle components on brake squeal




    Publication date :

    2011


    Size :

    20 Seiten, 9 Bilder, 8 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English




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