Recent content by renta

  1. R

    Designing a Vibration Absorber for a Two Degree of Freedom System

    Is this right so far? equations of motion…. c1x1’+m1x1”+k1x1+k2(x1-x2)+c2(x1’-x2’)=Fosinwt m1x2”+k2(x1-x2)+c2(x2’-x1’)=0 matrix form… [m1 0] [x1”] + [c1+c2 ...-c2][x1’] + [k1+k2...k1-k2][x1] =[Fosinwt] [0 m2] [x2”]...[-c2 ...c2]*[x2’]...[k2...-k2][x2]...[ 0 ]...
  2. R

    Designing a Vibration Absorber for a Two Degree of Freedom System

    please help me. I should also calculate k2 so that the natural frequency of the absorber is equal to the excitation frequency. I'm so confused with vibrations.
  3. R

    What Should You Study First in Physics at 18?

    my guess is "electronics and magnetism". that's what i had to take when i was a physics major
  4. R

    Designing Vibration Absorber: Questions Answered

    I'm trying to design a vibration absorber that will reduce the vibration of a machine by about 60%. I found the equations of motion of the machine without the absorber to be.. m1+x2"+ k1*x1+k2(x1-x2)+C2(x1'-x2')=Fo*sin(wt) and the absorber alone to be.. m1+x2"+k2(x1-x2)+C2(x2'-x1')=0 How...
  5. R

    Designing a Vibration Absorber for a Two Degree of Freedom System

    I'm trying to design a vibration absorber that will reduce the vibration of a machine by about 60%. I found the equations of motion of the machine without the absorber to be.. c1x1’+m1x1”+k1x1+k2(x1-x2)+c2(x1’-x2’)=Fosinwt and the absorber alone to be.. m1x2”+k2(x1-x2)+c2(x2’-x1’)=0 How...
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