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Stały URI dla kolekcjihttp://hdl.handle.net/11652/153

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20141

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Autorsearch.filters.applied.operator.equals: search.filters.author.Kamiński, MarcinTematsearch.filters.applied.operator.equals: search.filters.subject.konstrukcje stalowe

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  • Pozycja
    Stochastyczna analiza drgań wymuszonych stalowych wieź telekomunikacyjnych
    (Publishing House of Rzeszow University of Technology, 2014) Kamiński, Marcin; Szafran, Jacek
    The main aim of this paper is a presentation of computational analysis of the forced vibration of the steel telecommunication tower resulting from the uncertain wind blows with the use of the Stochastic Finite Element Method. This approach is based upon the Taylor expansion with random coefficients of a general order for all input and output random functions and determination of the structural response related to some input Gaussian design parameter. The forced vibration problem is solved numerically by using the Finite Element Method system ROBOT Professional, while the response functions are determined symbolically in the environment of the program MAPLE, where all the probabilistic coefficients are additionally computed. Deterministic form of the response functions are derived analytically with the help of the Least Squares Method and the series of the FEM-based experiments provided for the several discrete values of the design parameter that fluc-tuates about its expected value. The basic random parameter considered here is mean velocity of the wind, whose pressure is applied on the tower skeleton. The method proposed in this elabora-tion may be successfully further applied for a determination of the reliability indices for various engineering structures exhibiting different random parameters and also with deterministic loading spectra.