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Determine critical damping of multimass system 
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#1
Nov912, 03:33 AM

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Hi
I have a spring mass damper system with multiple masses. Is there any way I can calculate the magnitude of the damping in order to get a critical damped system? I have the scaling of the dampers(c1/c2) and they are connected in series. c_eq=c1+c2... I tried with the formula: ζ=1=c_eq/(2*m_eq*ω_n) ω_n=√(k/m) But it doesnt give the correct results so I did a FFT of the response to find the most dominating frequency and put in this new omega but without succes. Is it possible at all to determine a damping that satisfies this if the scaling(c1/c2) is to large? 


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