Exact frequency response of bars with multiple dampers

Gioacchino Alotta, Francesco Paolo Pinnola, Giuseppe Failla, Giuseppe Failla

    Risultato della ricerca: Article

    2 Citazioni (Scopus)

    Abstract

    The paper addresses the frequency analysis of bars with an arbitrary number of dampers, subjected to harmonically varying loads. Multiple external/internal dampers occurring at the same position along the bar, modelling external damping devices and internal damping due to damage or imperfect connections, are considered. In this context, the challenge is to handle simultaneous discontinuities of the response variables, i.e. axial force/displacement discontinuities at the location of external/internal dampers. Based on the theory of generalized functions, the paper will present exact closed-form expressions of the frequency response under point/polynomial loads, which hold regardless of the number of dampers. In addition, closed-form expressions will be derived for the exact dynamic stiffness matrix and load vector of the bar, to be used in a standard assemblage procedure for an exact frequency response analysis of 2D truss structures. Changes to consider a single damper at a given position are straightforward. Numerical applications show the advantages of the proposed method.
    Lingua originaleEnglish
    Numero di pagine20
    RivistaActa Mechanica
    Volume228
    Stato di pubblicazionePublished - 2016

    All Science Journal Classification (ASJC) codes

    • Computational Mechanics
    • Mechanical Engineering

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