@inproceedings{3f23e5c37e0144189e680cfe0c27b0d2,
title = "Identification of elastic and damping properties of sandwich structures based on high resolution modal analysis of point measurements",
abstract = "A method is proposed to identify the mechanical properties of the skin and core materials of sandwich structures having heterogeneous cores. All the elastic coefficients and loss-factors that matter in the dynamics of such a panel in the thick-plate approximation are identified. To this end, experimental natural modes (i.e. eigenmodes of the damped system) are compared to the numerical modes of large sandwich panels \{lx,ylh - 80). The chosen generic model for the visco-elastic behaviour of the materials is E(\textbackslash{} + jrj). The numerical modes are computed by means of a Rayleigh-Ritz procedure and their dampings are predicted according to the visco-elastic model. The frequencies and dampings of the natural modes of the panel are estimated experimentally by means of a high-resolution modal analysis technique. An optimisation procedure yields the desired coefficients. A sensitivity analysis assess the reliability of the method. Identification is conducted on two very different kind of sandwich panels to illustrate the method.",
author = "M. R{\'e}billat and X. Boutillon",
year = "2010",
month = jan,
day = "1",
language = "English",
series = "Proceedings of ISMA 2010 - International Conference on Noise and Vibration Engineering, including USD 2010",
publisher = "Katholieke Universiteit Leuven",
pages = "2577--2589",
editor = "P. Sas and B. Bergen",
booktitle = "Proceedings of ISMA 2010 - International Conference on Noise and Vibration Engineering, including USD 2010",
note = "24th International Conference on Noise and Vibration Engineering, ISMA 2010, in conjunction with the 3rd International Conference on Uncertainty in Structural Dynamics, USD 2010 ; Conference date: 20-09-2010 Through 22-09-2010",
}