Tire vibration modes as a characterization of tire dynamics are used in a broad range of tire/vehicle system simulations, ranging from low-frequency vehicle handling to higher frequency structure-borne and air-borne noise simulations. The modal parameters are used either to define a complete modal tire model or to calibrate parameters of a tire model to represent the proper dynamic behaviour. This paper presents the experimental modal analysis of non-rotating radial tires under different boundary conditions. The results are then used to analyze the influence of tire vibration modes on the structure-borne noise and vibration characteristics of a vehicle. Experimental modal analyses are performed on a slick - tire without tread pattern - and on a commercial tire, both of size 205/55R16. The tire is excited by 2 shakers and the dynamic responses on the tire and rim are measured in radial, tangential and axial direction with triaxial accelerometers. A modal analysis is performed under three different boundary conditions: free tire, unloaded tire on a fixed hub and loaded tire on a fixed hub. Mode shapes, resonance frequencies and modal damping are assessed up to 300 Hz. The modal parameters of the tire under different boundary conditions are analyzed and compared in order to obtain physical understanding of tire vibration modes. Throughout the whole paper, practical testing considerations and limitations in accuracy and frequency range are discussed. These limitations determine the accuracy and performance of tire/vehicle system simulations which use the experimental modal tire parameters as input data. Furthermore, the influence of tire vibration modes on the structure-borne noise and vibration characteristics of a vehicle is discussed. Tests are performed on a smooth road that contains a pattern of straight curbs. Vibration and noise frequency spectra are measured in the vehicle interior for different driving speeds and curb dimensions. The vibration and noise spectra of the curb impact response are analyzed to identify the tire modes that contribute significantly to the transfer of energy from the tire patch towards the vehicle structure. The results are compared and discussed in relation to the different driving speeds and curb dimensions.


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    Title :

    Experimental modal analysis of radial tires and the influence of tire modes on vehicle structure borne noise


    Additional title:

    Experimentelle Modalanalyse von Gürtelreifen und der Einfluß der Reifenmoden auf die Strukturakustik des Fahrzeuges


    Contributors:
    Kindt, Peter (author) / Coninck, Filip de (author) / Sas, Paul (author) / Desmet, Wim (author)


    Publication date :

    2006


    Size :

    12 Seiten, 14 Bilder, 9 Quellen


    Type of media :

    Conference paper


    Type of material :

    Storage medium


    Language :

    English





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