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Homework Help: Response to a forced 2 DOF system

  1. Apr 12, 2009 #1
    I have a forced 2 degree of freedom system that I am trying to find the steady state responses to. I have determined the two equations of motions and found the [m], [k], [c], and {f} matrixes.

    However when i try to use eigen analysis ( q=phi'*[m]*phi ) I am unable to uncouple the two equation of motion to allow me to solve the system as two independ. single degree of freedom systems.

    I believe I have correctly set up the EOMs... what other methods can I use to solve for the x and y steady state responses.

    PS i am using matlab.
  2. jcsd
  3. Apr 14, 2009 #2
    What is your system? Are you sure it is possible to decouple the two equations?

  4. Apr 17, 2009 #3
    i guess it is impossible to uncouple the system (non symetric striffness matrix)... i think i figured it out by matrix inversion method
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