Earthquake response - Single degree of freedom elevated mass

[Dunc26]

Hello

Don't know if this is in the right forum but I'm looking for some tips on analysis of the earthquake reponse of an elevated mass. I have the mass, the natural frequency and the damping coefficient. I am also told the ground acceleration due to the earthquake can be approximated by the constant spectrum So=0.0075m2/s3.

I am struggling as to how to use this in an attempt to find the frequency response function of the mass and the mean square response of displacement.

Any pointers??

Thanks

 

[Twoballcane]

Hmmmm I think earthquake response are typically in PSD or g^2/hz, which in turn is Random Vibration. I'm not sure what the So=m2/s3 is...

Tobalcane
"If you avoid failure, you also avoid success."

 

[IRstuff]

g^2/Hz = m^2/s^3

TTFN

FAQ731-376

 

[Dunc26]

Thanks guys

How do I go about using the response to find the response function of an object?

 

[FeX32]

Analytical or numerical?


Fe

 

[GregLocock]

You work out the trandfer function for a single degree of freedom system and multiply it by your excitation spectrum.

Cheers

Greg Locock


New here? Try reading these, they might help FAQ731-376

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[MikeHalloran]

Perhaps it's time to re-read the course text, or find a different one that may be more comprehensible.



Mike Halloran
Pembroke Pines, FL, USA

 

[Twoballcane]

Ohhhh...thanks IR

Tobalcane
"If you avoid failure, you also avoid success."