Abstract: In order to solve the problem of large difference between the initial finite element analysis and experimental test, the model test data of the honeycomb sandwich panels are used as updated target to identify the cure thickness of laminate panel and the material parameters of honeycomb core based on the structural dynamic model updating. The updated results show that updated FE model has high rationality and could be used for other dynamic problems analysis. Beside, for complicated engineering structures, the simple tests can be adopted to modify the design parameters so as to improve the overall analysis accuracy and have certain engineering practical value.

Key words: model updating, finite element, honeycomb sandwich panels, model analysis, sensitivity