Measurement of the Vibration Reduction of a circular Saw Blade with an integrated vibroacoustic Metamaterial in the rotating State

Circular saw blades are thin-walled disk-shaped structures which are prone to vibrations excited by the sawing process, leading to high sound pressure levels. In the presented work a saw blade with an integrated vibroacoustic metamaterial is experimentally investigated in the rotating state for its structural dynamic behavior up to rotational speeds of 3000 rpm. The saw blade is excited with an impulse hammer and measured with a stationary laser Doppler vibrometer. A stop band, which does not shift in frequency with increasing rotational speed is obtained in the frequency range of $1900-2500 \mathrm{~Hz}$. Adjacent modes, splitting up due to rotation, do not propagate into the stop band with increasing rotational speed.