Fuzzy finite element method: An experimental modal analysis comparison

This paper presents a comparison of numerical and experimental modal solutions in which geometrical and material imperfections have been taken into account. First, several experimental modal analyses were completed for specific design variable values and the results were aggregated to fuzzy numbers in order to constitute a fuzzy experimental reference. Second, a fuzzy finite-element model was built and the imperfections were propagated on the eigensolutions using a dedicated method. Finally, the fuzzy numerical quantities were compared with the experimental quantities to highlight the efficiency of non-deterministic models for predicting the test structure's behavioural modifications.