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  • Magnetostriction-induced dynamics of laminated structures [Elektronski vir]
    Javorski, Matija ...
    This research provides a new methodology for identification and calculation of the dynamic behaviour of laminated structures, resulting from magnetostriction. The topic relates to electrical steel ... components of electrical devices (e.g., the transformer cores, stators, and rotors of specific electric motors) and a similar test structure was prepared in form of a clamped stack of electrical steel laminations. Firstly, the excitation mechanism via magnetostriction was experimentally identified and analysed in the frequency domain. Significant frequency components were extracted and a function approximation was made. On this basis, a magnetostriction model for use in finite element analysis (FEA) was prepared. Secondly, a finite element model of the structure was made with the emphasis on the assembly technique, the resulting frictional contact between laminations and material orthotropy. The numerical model was validated against the results of an experimental modal analysis. Finally, a set-up for analysis of magnetostriction-induced vibrations was built and operating deflection shapes method was used to measure the response. The magnetic field of the set-up was analysed using FEA, providing input data for the magnetostriction model. The latter was integrated into the structural numerical model. Vibrations of the structure, resulting from magnetostriction, were calculated and compared to the experimental data.
    Source: Proceedings of the XI International Conference on Recent Advances in Structural Dynamics, 1-3 July, Pisa, Italy [Elektronski vir] (Datoteka 1046_NT (14 str.))
    Type of material - conference contribution
    Publish date - 2013
    Language - english
    COBISS.SI-ID - 13005339

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