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Me soon, mass and spring equation

  1. Aug 17, 2012 #1
    plz help me soon, mass and spring equation

    hi, sorry for my bad english, i need to three mass and four spring ode equations,
    this system: wall -- spring -- mass -- spring -- mass -- spring -- mass -- spring -- wall

    but i need this system that has damped, because i have this system equation that undamped,

    undamped.jpg

    plz help me soon, i need damped equation soon, thanks to all :!!)
     
  2. jcsd
  3. Aug 17, 2012 #2

    HallsofIvy

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    Re: plz help me soon, mass and spring equation

    People cannot read your mind! There are many possible "damping" functions, most often linear or quadratic but can have almost any form. You probably want the simplest, linear, which is of the form [itex]-\nu(x_i)'[/itex] where [itex]\nu[/itex] is the "damping coefficient". Put one of those into each equation.
     
    Last edited: Aug 17, 2012
  4. Aug 17, 2012 #3
    Re: plz help me soon, mass and spring equation

    thanks
     
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