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1-Visitor
August 25, 2018
Question

question matrix

  • August 25, 2018
  • 2 replies
  • 3054 views

hai all 

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

2 replies

23-Emerald IV
August 25, 2018

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

21-Topaz II
August 25, 2018

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

1-Visitor
August 26, 2018

thanks for your help 

 

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

Capture.JPG

21-Topaz II
August 26, 2018

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