Sensitivity analysis applied to the dynamics of structures by changing the inertial properties

Keywords: Operational modal analysis, scaling factor, sensitivity, mass-change method

Abstract

Within the dynamics of structures, sensitivity analysis shows how to achieve the most effective modification to reach a change in the structural behaviour.Usually,  the  modal  model  is  available,  has  a  limited  number  of  vibration  modes;  even  so,  it  is  possible  to  achieve  a  reasonable  approximation  to  estimate the sensitivities of the natural frequencies and the eigenvectors. Throughout the exhibition of the work, we develop an experimental validation of both analytical expressions for determining estimates of modification of modal parameters, i.e., estimates of the variation of the frequency deviation Δωi, and the increase Δ{ψi } the components of each eigenvector, belonging to the mode i.

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Author Biography

Luis Manuel Villa-García, Universidad de Oviedo
Dpto. de Construcción e Ingeniería de Fabricación, Profesor Colaborador

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Published
2014-02-12
How to Cite
Villa-García L. M. (2014). Sensitivity analysis applied to the dynamics of structures by changing the inertial properties. Revista Facultad De Ingeniería Universidad De Antioquia, (70), 66-74. Retrieved from https://revistas.udea.edu.co/index.php/ingenieria/article/view/14869