Finite element model of closed composite cylinder and its experimental verification

Abstract

The paper presents the experimental verification of the numerical model developed for a closed composite cylinder structure. The operational modal analysis (OMA) techniques are used for modal parameter estimation of the cylinder tested. The impact hammer was used for excitation and the network of piezo films measured the vibration response providing experimental estimation of the cylinder modal parameters. The modal assurance criterion was applied to initially identified modes that allows validating the most stable modes of the closed composite cylinder. Then, the modal parameters of stable modes were used for finite element (FE) model verification. Good agreement between measured and modelled frequencies and mode shapes up to 400 Hz was achieved.