This paper presents a method to measure torsional natural frequencies and to calculate moment of inertia and torsional stiffness of a shaft. The concepts of equivalent mass moment of inertia and equivalent torsional stiffness are used to model the shaft. The method applies two identical accelerometers to measure the frequency response functions (FRFs) on two symmetric positions about the shaft. Adding these two FRFs, the bending components of the FRFs are canceled, whereas the torsional components of the FRFs are retained and enhanced. Hence, the torsional natural frequencies of the shaft can be found. By attaching a uniform hollow disk firmly to the free end of the shaft and measuring the new FRFs of the system with the disk, the moment of inertia and torsional stiffness of the shaft can be calculated.


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    Title :

    Measurement of Torsional Natural Frequencies, Moments of Inertia and Torsional Stiffness of Shafts


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    SAE 2005 Noise and Vibration Conference and Exhibition ; 2005



    Publication date :

    2005-05-16




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Measurement of torsional natural frequencies, moments of inertia and torsional stiffness of shafts

    Chang,C.C. / Southern Taiwan Univ.of Technol.,TW | Automotive engineering | 2005


    Measurement of Torsional Natural Frequencies, Moments of Inertia and Torsional Stiffness of Shafts

    Chang, C-C. / Society of Automotive Engineers | British Library Conference Proceedings | 2005


    Torsional vibrations of shafts

    Gu¨ / mbel, L. | Engineering Index Backfile | 1902


    Torsional Oscillation of Shafts

    Beilschmidt, J.L. | Emerald Group Publishing | 1936


    Torsional Strength of Splined Shafts

    HUEBOTTER, H. A. / ZUCROW, M. J. | SAE Technical Papers | 1927