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Dynamic mass/spring/damper

  1. Mar 18, 2015 #1
    1. The problem statement, all variables and given/known data
    Hi I have attemted to work out the undamped natural frequency and the damping ratio can someone please confirm if this is correct? and for question d I have worked out r and TR can someone please confirm if this is correct? if all is correct I need help with plotting a graph for question d with the parameters set at the bottom of the question can you please help me anyone?

    2. Relevant equations


    3. The attempt at a solution
     

    Attached Files:

  2. jcsd
  3. Mar 18, 2015 #2
    Hi this is the correct file by the way the file on my first post is incorrect
     

    Attached Files:

  4. Mar 18, 2015 #3

    donpacino

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    In part D you are given the relationship between TR and r. You can use that equation to get the graph.
     
  5. Mar 18, 2015 #4

    BvU

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    Seeing $$r = {\omega\over \omega_n} = r = {10\over 22.4} = 3.565 $$ hurts my eyes (in more than one way). Can you explain this ?
     
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