On uncertain parameter identification from experimental data in structural dynamics and vibroacoustics

摘要

Modeling of engineering problems in structural dynamics and vibroacoustics involves knowledge of uncertainty related with parameters, e.g. elastic and damping properties. The theoretical and numerical aspects of uncertainty quantification (UQ) in such parameters have been well developed over the past decades. The validation of results, however, remains as challenging issue due to the lack of coherent and consistent experimental data upon desired performance. This is particularly important when dealing with numerical FEM models with uncertain inputs. In this paper, the fundamental concept of experimentally UQ in structural dynamics and vibroacoustics will be discussed. The prompt will be on introducing a general framework by which UQ is performed using limited data available. Once the experimentally identified inputs are known, statistical properties of uncertain structural responses are updated using numerical FEM model.