The analysis of parallel damped dynamic vibration absorbers is presented. The system considered is essentially a modification of the conventional damped vibration absorber and consists of adding, in parallel, a subsidiary undamped absorber mass in addition to the damped absorber mass. The analysis clearly shows that it is possible to obtain an undamped antiresonance in a dynamic absorber system which exhibits a well-damped resonance. While the bandwidth of frequencies between the damped peaks is not significantly increased, the amplitudes of the main mass are considerably smaller within the operational range of the absorber. The damped absorber mass and the main mass attain null simultaneously so that the vibratory force is transmitted directly to the undamped absorber. Numerical results are presented for the special case when the absorber masses have the same magnitude. Two cases of tuning have been considered: (a) when the absorber masses are tuned to the frequency of the main mass, and (b) when the absorber masses are tuned to the so-called favorable tuning frequency. Comparison of the results with those of the conventional absorber indicates that the parallel damped dynamic vibration absorber has definite advantages over the conventional damped vibration absorber.
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February 1969
This article was originally published in
Journal of Engineering for Industry
Research Papers
Analysis of Parallel Damped Dynamic Vibration Absorbers
A. V. Srinivasan
A. V. Srinivasan
Kaman Aircraft, Bloomfield, Conn.
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A. V. Srinivasan
Kaman Aircraft, Bloomfield, Conn.
J. Eng. Ind. Feb 1969, 91(1): 282-287
Published Online: February 1, 1969
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Received:
June 7, 1968
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Srinivasan, A. V. (February 1, 1969). "Analysis of Parallel Damped Dynamic Vibration Absorbers." ASME. J. Eng. Ind. February 1969; 91(1): 282–287. https://doi.org/10.1115/1.3591545
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