Damping in Modal Method. Part III: Paradox with Cut-Off Modal Damping

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Rubric:     Theoretical and experimental studies   
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Common opinion is that one can provide conservative results of dynamic analysis by decreasing modal damping; as such a decrease leads to the increase of response values. The author has shown that it is not always true: sometimes the “cut-off” of modal damping coefficient leads to the decrease of response. Previously this effect was demonstrated in terms of the transfer functions in the frequency domain. Here the same effect is demonstrated in standard dynamic analysis.