Experimental evaluation of dynamic vibration absorbers for vibration suppression in beam structure

The efficiency of dynamic vibration absorbers (DVAs) in reducing vibrations in beam structures is experimentally assessed in this research. The dynamic vibration absorbers are small devices added to a structure, that use a mass-spring-damper system calibrated to the natural frequency of the structure to reduce vibration levels. The experimental examination included the addition of these absorbers to a beam structure and the measurement of the levels of vibrations under various circumstances. The dynamic behavior of a beam is examined experimentally under two boundary conditions (pinned-free, cantilever), with different configurations of the dynamic vibration absorbers’ design parameters and placements along the beam. External vibrations are applied to the beam, and their amplitude is measured both with and without the absorbers. Investigations are conducted on the effects of the absorber’s mass, stiffness, and locations. The findings demonstrated that adding DVAs to the beam structure greatly reduced vibration levels, especially at the beam natural frequency. Both mass and stiffness significantly reduce the dynamic response (from, for instance, 0.018m to 0.00052m). However, this effect changes based on the boundary conditions. If the DVA is situated at the point of maximum displacement, the minimal needs of the DVA parameters can better reduce the dynamic response.