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EOMs for T Shaped Pendulum with Non-Conservative Force

  1. Dec 16, 2008 #1
    EOMs for "T" Shaped Pendulum with Non-Conservative Force

    I have a set of equations of motion I'm trying to derive. This problem represents a 2-d approximation of the real system that I'm trying to derive equations of motion for modeling purposes.

    There is a base mass and a top mass.

    The base mass is constrained to move only in the x direction and is connected by a linear spring to ground which is meant to produce forces that restore the mass to the x = 0 position. Friction is ignored.

    The top mass designated (the "T" shaped pendulum) can rotate about the point at the center of the base coordinate system. A torsional spring is operating on the pendulum to produce forces that restore it to the vertical position.

    I've chosen my generalized coordinates to be x (corresponding to x-base) and theta (rotation of pendulum from horizontal).

    I will include my derivations in reply to this post but my main question is whether I did the virtual work properly? Do I need to for any sort of moment-work?
     
  2. jcsd
  3. Dec 16, 2008 #2
    Re: EOMs for "T" Shaped Pendulum with Non-Conservative Force

    System Figures
     

    Attached Files:

  4. Dec 16, 2008 #3
    Re: EOMs for "T" Shaped Pendulum with Non-Conservative Force

    Pages 1 through 3
     

    Attached Files:

  5. Dec 16, 2008 #4
    Re: EOMs for "T" Shaped Pendulum with Non-Conservative Force

    Pages 4 through 5
     

    Attached Files:

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