Validation of structural dynamics models containing uncertainties
نویسندگان
چکیده
This paper deals with model validation in structural dynamics for a family of quasiidentical structures in the context of uncertain measurements. The crucial point is for the engineer to be able to quantify the quality of the model, which is probabilistic with respect to a set of measurements from which a probability density function can be extracted. Our approach is based on the ”mechanical concept” of Constitutive Relation Error Estimator (CRE), which was introduced initially in order to quantify the quality of finite element analyses, then developed in the deterministic context. Our extended CRE estimator enables us to quantify the quality of a given probabilistic model and, thus, to update and validate the model. Several examples are given, including an industrial case.
منابع مشابه
Uncertainty Quantification in Computational Structural Dynamics: a New Paradigm for Model Validation
*Structural Dynamics Dept., Org. 9234 †Aerosciences Dept., Org. 9115 ‡Statistics and Human Factors Dept., Org. 12323 **Statistics and Human Factors Dept., Org. 12323 ABSTRACT. We present an overview of new research efforts underway at Sandia National Laboratories to understand the sources of uncertainty and error in computational structural dynamics and other physics simulations, and to quantif...
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