A new type of low frequency vibration transducer (LFVT) and the signal processing procedure used in estimation of dynamic characteristics of structure are discussed. A circuit network is adopted in the LFVT to compensate the low frequency characteristics of seismic velocity transducer with high resonant frequency, reliability and robustness, which is the primary sensor. The output characteristics of LFVT are just like those of a seismic velocity or displacement transducer with very low resonant frequency which is 1/20 to 1/50 of that of the original pick-ups. Engineering estimation methods of natural frequency and vibration mode are discussed. An improved algorithm to determine the damping ratio is put forward. In the algorithm, we use the frequency response of a second order system to fit the estimated power spectra of the signal and solve the problem of nonlinearity in this process. The algorithm has a much better precision than the generally used bandwidth method. Experiments on a railway bridge are given.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Measurement of dynamic characteristics of structure


    Beteiligte:
    Xuezhi Yang, (Autor:in) / Puchiang Yan, (Autor:in) / Lei Yan, (Autor:in) / Jianmin Wang, (Autor:in)


    Erscheinungsdatum :

    2000-01-01


    Format / Umfang :

    352100 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Measurement Of Dynamic Characteristics Of Structure

    Yang, X. / IEEE | British Library Conference Proceedings | 2000


    Prediction and measurement of human pilot dynamic characteristics

    Hess, Ronald A. / Reedy, James T. | NTRS | 1988



    Measurement of dynamic characteristics of soils with penetrometers

    Womack, David P. / Cox, William R. | TIBKAT | 1967