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Validation of PIRAT a Novel Tool for Beam-Like Structures Subject to Seismic Induced Misalignment of Guiding Sleeves

Abstract : This paper is a comparison of analytical and numerical evaluations for a model system, which consists of a vertically suspended beam-like structure, guided by a pair of sleeves subjected to static or dynamic transverse displacements. The goal of these analyses is to evaluate and describe the mechanical behavior of such system during situations involving significant misalignment of the guiding sleeves, primarily caused by horizontal seismic vibrations. The analytical evaluation of the beam is performed using a solver in the novel tool PIRAT that incorporates the Bresse method to determine deflection shape and stress of the beam, where the numerical calibration uses a finite element solver called Cast3M. Both of these methods also investigate the evolving contact between the beam and its guiding sleeves (including a rigid lower sleeve and a semi-rigid upper sleeve) by an iterative algorithm to add additional contact zones / pressures to more realistically replicate the natural system. Illustrative computations are performed in order to verify that both methods are able to produce the same results / trends using a static deformation profile for the guiding sleeves. With the static models sufficiently validated and calibrated, the preliminary dynamic response of the system is presented. These are produced by replacing the static Bresse method with the dynamic EulerBernoulli equation of motion in the analytical framework. This is also compared to the dynamic capabilities of Cast3M, which relies on modal analysis, for validation. The work in this paper signifies the next step in developing a set of tools for considering dynamic responses to ensure the proper behavior of such systems during seismic activities through the use of analytical evaluations.
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Submitted on : Thursday, March 5, 2020 - 2:02:37 PM
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  • HAL Id : cea-02400206, version 2




M. Bonney, M. Zabiego. Validation of PIRAT a Novel Tool for Beam-Like Structures Subject to Seismic Induced Misalignment of Guiding Sleeves. ISMA2018 - International Conference on Noise and Vibration Engineering, Sep 2018, Louvain, Belgium. ⟨cea-02400206v2⟩



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