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Vibrating string displacement, partial differential problem

  1. Feb 9, 2008 #1
    1. The problem statement, all variables and given/known data
    A damped vibrating string of length 1, that satisfies
    u_tt = u_xx - ([tex]\beta[/tex])u_t

    with the boundary conditions:

    initial conditions:


    solve for u(x,t) if [tex]\beta[/tex]^2 < 4Pi^2

    3. The attempt at a solution

    if u(x,t)=F(x)G(t)

    So by using partial differential equations, I got:


    I solved for F(x) with B.Cs and got:
    F(x)=C*Sin(P*x), where C is a const.

    when I tried to solve for G(t), I got a long equation with 2 constants in there.
    If I try to solve for u(x,t) by using the F(x)G(t), I will have something with three unknow constants.

    Am I on the right track?
    I'm not sure how/when to apply I.Cs and [tex]\beta[/tex] to solve for u(x,t).

    Thank you very much!
  2. jcsd
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