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Damping parameter calculation

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Renil

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damping parameter

Hi all,

I am confusing with material damping (mass and stiffness damping) in MEMS structures. Mine is a fixed-fixed beam with a mass attached at the center of the beam. during electrostatic actuation it produce some ringing. I am using Intellisuite MEMS cad tool for the dynamic respose analysis of the structure. In which I have to mention mass and stiffness damping parameters to define the damping ratio according to the following equation.
ζ=(α/2ω)+(βω/2)
ζ=Damping ratio
α=Mass damping
β=Stifness damping
ω=Natural frequency
How to deduce α&β from the structural dimension of the above mentioned system.

I will be satisfied if anyone could help me.

Regards
 

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