Experimental Study on by Multi-DOF Dynamic Vibration Absorber for Beam Vibration Control
摘要
To reduce vibration problems in the design of lightweight structures, passive dynamic vibration absorbers (DVA) are widely used due to its simply structural and without extra power requirement. In order to suppress the multiple-modes of the vibrating beam by using a single DVA, this study proposed a multiple degree-of-freedom (DOF) beam type DVA. A model for the equivalent stiffness of the beam type DVA is presented. The natural frequencies of the proposed DVA can be adjusted by changing the weight and position of the additional mass block. The experimental results show that the proposed DVAs have a significant suppression effect on the cantilever beam. It is shown that a single two-DOF DVA can control the five modes of the cantilever beam. Furthermore, the an optimized four-DOF DVA has a better vibration suppression performance and a wider frequency band control effect for the first five modes of cantilever beam.