A problem of damping coefficient GE

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello ,

I have a problem of Damping Coefficient(GE) in property PELAS, the optistruct help menu define the Damping Coefficient(GE) as below:

To obtain the damping coefficient GE, multiply the critical damping ratio, C/C0, by 2.

So, as the statement above, I just need to multiply the critical damping ratio by 2, then I can get the Damping Coefficient(GE),is it right?

Or there are some relation between critical damping ratio and Damping Coefficient(GE) in optistruct?

Thanks for help !!

Best regard !

Jeff

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Answers

  • Altair Forum User
    Altair Forum User
    Altair Employee
    edited July 2011

    Hello ,

    I have a problem of Damping Coefficient(GE) in property PELAS, the optistruct help menu define the Damping Coefficient(GE) as below:

    To obtain the damping coefficient GE, multiply the critical damping ratio, C/C0, by 2.

    So, as the statement above, I just need to multiply the critical damping ratio by 2, then I can get the Damping Coefficient(GE),is it right?

    Or there are some relation between critical damping ratio and Damping Coefficient(GE) in optistruct?

    Thanks for help !!

    Best regard !

    Jeff

    as i know:

    Overdamped (ζ > 1): The system returns (exponentially decays) to equilibrium without oscillating. Larger values of the damping ratio ζ return to equilibrium slower.

    Critically damped (ζ = 1): The system returns to equilibrium as quickly as possible without oscillating. This is often desired for the damping of systems such as doors.

    Underdamped (0 < ζ < 1): The system oscillates (at reduced frequency compared to the undamped case) with the amplitude gradually decreasing to zero.

    Undamped (ζ = 0): The system oscillates at its natural resonant frequency (ωo).

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