The position of the center of mass - mass + stiffness matrices

[inplay]

In "Flexible Mulibody Dynamics" by Geradin and Cardona it's written that one can compute the position of the center of mass from the stiffness and mass matrices of the element. Is it realy possible? I couldn't find any information about this technics.

Does anybody have some information about it?

 

[electricpete]

no response... maybe try mechanical acoustics/vibration forum

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[GregLocock]

The K and M matrix can be solved to provide estimates of the eigenvalues and eigenfrequencies of the real system. Ideally this would correlate with the measured modal response of the real system, and as this paper shows the modal results can be used to estimate the inertial properties of the system

http://inderscience.metapress.com/a...nal,9,15;linkingpublicationresults,1:110896,1

So in a roundabout way, yes I agree it is possible.

But I do not know how to do it.





Cheers

Greg Locock

I rarely exceed 1.79 x 10^12 furlongs per fortnight

 

[inplay]

GregLocock,

Thank you for your answer! Unfortunately, I don't have access to this article. If it's possible and allowed could you share this paper with me?

 

[GregLocock]

I'd have to pay for it just like you would.

Cheers

Greg Locock

I rarely exceed 1.79 x 10^12 furlongs per fortnight