Abstract：To dissipate the unwanted vibration energy of a plate at mode frequencies, academic and experimental research of composite beam, which is used to control the plate’s vibration, are carried on. A simply-supported plate is selected as the classical object to be controlled. And finite element method is applied to design and analyze the absorption of composite beams with various cross-section unconstrained layer. Then, the experiment is operated to validate the conclusions derived from simulation. Both the analysis results and the experimental data indicate that the number of mode used to attenuate the energy of the plate and the bandwidth of the absorber grow with the increase of beam length, while the absorption at model frequencies of the beam decreases in such situation; the absorber fitted at the location near the driving point is excellent in mitigating vibration energy of plate; the lower mode of the beam is applied to absorb the plate’s energy, the greater absorption will be achieved.
2011, Vol. 30 
