Dynamic analysis about the beams of cantilever screen

In order to study the dynamics of the beams of cantilever screen (BCS), the finite element analysis and motion simulation were made using the ANSYS and ADAMS. The modal parameters, harmonic analysis and flexible body simulation data of the BCS were obtained. The results show that: there is a `Frequency veering´ phenomenon in the BCS modal analysis and the natural frequencies are relatively concentrated; the largest deformation of the BCS appears in the end of the under cantilever bar in the middle BCS; not only cantilever bar has the `secondary vibration´ phenomenon in the movement direction, but also the spacing change of the adjacent cantilever bars is regular. Draw the following conclusions: the symmetric periodic structure of the BCS produces a `Frequency veering´ phenomenon; because of the hollow beam deformation, the spacing of adjacent cantilever bar and the shape of cantilever bars group regularly change.