An updating method for structural dynamics models with uncertainties

Issue title: The International Conference on Engineering Dynamics 2007

Article type: Research Article

Authors: Faverjon, B. | Ladevèze, P. | Louf, F.

Affiliations: LMT-Cachan (ENS Cachan/CNRS UMR8535/Paris 6 University), 61, avenue du Président Wilson, F-94235 Cachan Cedex, France

Note: [] Corresponding author. E-mail: [email protected]

Abstract: One challenge in the numerical simulation of industrial structures is model validation based on experimental data. Among the indirect or parametric methods available, one is based on the "mechanical" concept of constitutive relation error estimator introduced in order to quantify the quality of finite element analyses. In the case of uncertain measurements obtained from a family of quasi-identical structures, parameters need to be modeled randomly. In this paper, we consider the case of a damped structure modeled with stochastic variables. Polynomial chaos expansion and reduced bases are used to solve the stochastic problems involved in the calculation of the error.

Keywords: Damping, validation, dissipation, constitutive relation error, stochastic model, polynomial chaos

Journal: Shock and Vibration, vol. 15, no. 3-4, pp. 245-256, 2008