Abstract
In this study, we analyzed the vibration and noise in the case that a cylinder was impacted axially, and proposed an effective method to suppress the vibration and noise. A cantilever cylinder was chosen as the subject, and the vibration of the cylinder and the sound pressure around the cylinder were investigated in the case that a weight collided with the cylinder axially. From the experimental results, it was shown that in the case of the axial impact, the bending vibration modes were excited by the eccentric collision and the components of the bending modes were dominant in the noise data. Then we proposed a noise suppression method, i.e., attachment of a small jig around the bar. It was shown that an effective suppression effect can be obtained when the jig is attached near the free end of the bar with small clamping torque.
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