question matrix

[mostafaelhodiry]

hai all 

hwo to get the solution of the d , from the equation (k-w^2*m)*Phi

[LucMeekes]

This does not make sense.

The variable 'd' is not in the equation you provide, so you cannot solve for it.

Note that 'find' can only be used in a 'solve block', and a solve block cannot be used in a program.

Where is the worksheet?

What exactly are you trying to achieve?

Luc

[terryhendicott]

Hi

(k-w^2*m)*Phi

Can be expressed as k*Phi=w^2*m*Phi

You can resolve w^2=genvals(k,m).  So w is simply the element by element square root of genvals(k.m).

You can resolve the modes as modes=genvecs(k,m).

Regards

Terry

[mostafaelhodiry]

thanks for your help 

kindly how to get the values of phi (eign values ) like as shown in figure below 

[terryhendicott]

Hi,

You can resolve w^2=genvals(k,m).  So w is simply the element by element square root of genvals(k.m).

You can resolve phi as phi=genvecs(k,m).  Each column of phi is a mode shapes.

Regards

Terry

[mostafaelhodiry]

THANKS FOR HELPING ME 
IT IS WORKING NOW 
THANKS 

[Werner_E]

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@mostafaelhodiry wrote:

thanks for your help 

kindly how to get the values of phi (eign values ) like as shown in figure below

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Just type in what terry had already written a few times. There is no more to it!

Here is an example with the values you provided in a file you attached in another post: