Modal analysis in workbench

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  • Last Post 2 weeks ago
MemoriseXuxu posted this 2 weeks ago

Here I meet a problem about the damping modal in Workbench (ANSYS 18) .

First,

how does the software calculate the stiffness coefficient ? I have found some guidance in this link but the result is not correct. 

Second,

I follow this public essay and I want to redo what he has done. But he only give the parameter above so I have a doubt that the parameter is enough to calculate. 

Hopefully I can get your guidance!

Thanks all guys!

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sk_cheah posted this 2 weeks ago

Damping ratio is mode dependent. You could try approximating it via the stiffness and mass coefficient. Please see here for some documentation.


Kind regards,
Jason

MemoriseXuxu posted this 2 weeks ago

But I also need to calculate the parameter using Damping Ratio so that I can calculate the stiffness and mass coefficient. So here the problem is still about the frequency the Ansys defined.Because the frequency above is a range of frequency but not a specific number.

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