Probabilistic response of linear structures equipped with nonlinear dampers devices (PIS method)

Antonina Pirrotta, Barone, Giacomo Navarra, Antonina Pirrotta

Risultato della ricerca: Articlepeer review

24 Citazioni (Scopus)

Abstract

Passive control introducing energy absorbing devices into the structure has received considerable attention in recent years. Unfortunately the constitutive law of viscous fluid dampers is highly nonlinear, and even supposing that the structure behaves linearly, the whole system has inherent nonlinear properties. Usually the analysis is performed by a stochastic linearization technique (SLT) determining a linear system equivalent to the nonlinear one, in a statistical sense. In this paper the effect of the non-Gaussianity of the response due to the inherent nonlinearity of the damper device will be studied in detail via the Path Integral Solution (PIS) method. A systematic study is conducted showing that for a very wide range of parameters the SLT gives satisfactory results in terms of variance of displacement and velocity but not in terms of joint Probability DensityFunction (PDF). It has also been shown that at steady state the two processes, displacement and velocity, may be considered as independent ones.
Lingua originaleEnglish
Numero di pagine8
RivistaProbabilistic Engineering Mechanics
Volume23
Stato di pubblicazionePublished - 2008

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Civil and Structural Engineering
  • Nuclear Energy and Engineering
  • Condensed Matter Physics
  • Aerospace Engineering
  • Ocean Engineering
  • Mechanical Engineering

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