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Technical Paper

FEM Evaluation of Elastic Wedge Method for Damping of Structural Vibrations at Low Frequencies

2011-05-17
2011-01-1689
This paper presents new results regarding damping of structural vibrations using the elastic wedge method. An elastic wedge is a plate, or a rod, whose thickness decreases smoothly towards zero. Flexural vibration energy accumulates at the thinner edge and thus, effective damping can be easily achieved. The method has been proposed to reduce flexural vibrations of structures in the high frequency range, like vibration of turbine blades. In this research, the application of the elastic wedge method to reduce structural vibration in low frequency ranges is investigated using FEM. The structure under analysis is a heavy machinery bed structure. Two rod elastic wedges are attached to that bed. The target frequency range to be damped is between 150 and 250Hz. The results show that the elastic wedge method can effectively reduce the structural vibration of the bed in the target frequency range.
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