This paper presents an overview of the composite engineering projects. Research objectives, scope of the performed tests, computational activities and main project results will be highlighted. The main goal of this multidisciplinary projects is to investigate the dynamic properties of fibre reinforced composite structure. Non-destructive experimental and numerical simulation methods were applied. The test results were used in two ways: for the identification of the mechanical properties of the structure and for non- deterministic updating the Finite Element Model according to range of experimental models obtained from test. In the experimental part the different test configurations were taken into account. The sources of the test data variabilities were the excitation and measurement technique applied for investigated object. The former was performed by means of the random and harmonic, single and multi point excitation while the latter was contact and non-contact acceleration and velocity measurement. Non deterministic model updating and verification & validation included uncertainties of its parameters by means of interval and stochastic methods. An optimisation technique for test (sensor number and location) was applied. A number of variable test modal models were statistically assessed to investigate impact of variability source onto modal model parameters.

Variability in Composite Structure Vibration Measurement and Numerical Model Updating

MUCCHI, Emiliano;
2009

Abstract

This paper presents an overview of the composite engineering projects. Research objectives, scope of the performed tests, computational activities and main project results will be highlighted. The main goal of this multidisciplinary projects is to investigate the dynamic properties of fibre reinforced composite structure. Non-destructive experimental and numerical simulation methods were applied. The test results were used in two ways: for the identification of the mechanical properties of the structure and for non- deterministic updating the Finite Element Model according to range of experimental models obtained from test. In the experimental part the different test configurations were taken into account. The sources of the test data variabilities were the excitation and measurement technique applied for investigated object. The former was performed by means of the random and harmonic, single and multi point excitation while the latter was contact and non-contact acceleration and velocity measurement. Non deterministic model updating and verification & validation included uncertainties of its parameters by means of interval and stochastic methods. An optimisation technique for test (sensor number and location) was applied. A number of variable test modal models were statistically assessed to investigate impact of variability source onto modal model parameters.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11392/533984
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