- #1
Bluesky1
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Spring, Mass , Damper system. Damper Value.
Hi,
I have a problem with first question from site below:
http://engineeronadisk.com/V2/notes_courses/engineeronadisk-91.html#pgfId-521824
I was trying to solve it using transmissibility equation but there is no mass so I can't find a natural frequency.
Transmissibility is in this case 0.01% because the isolation required is 99.9%.
T= sqrt {[1+4*d^2*(f/f0)^2]/[(1-(f/f0)^2)^2 + 4*d^2*(f/f0)^2]}
d- damper value
f- frequency which is 100Hz
f0- natural frequency
The other way is to use dynamic equation and then find transfer function:
dynamic equation: cx' + kx = M x''
but the Mass is unknown and it's the problem.
Please help
Homework Statement
Hi,
I have a problem with first question from site below:
http://engineeronadisk.com/V2/notes_courses/engineeronadisk-91.html#pgfId-521824
The Attempt at a Solution
I was trying to solve it using transmissibility equation but there is no mass so I can't find a natural frequency.
Transmissibility is in this case 0.01% because the isolation required is 99.9%.
T= sqrt {[1+4*d^2*(f/f0)^2]/[(1-(f/f0)^2)^2 + 4*d^2*(f/f0)^2]}
d- damper value
f- frequency which is 100Hz
f0- natural frequency
The other way is to use dynamic equation and then find transfer function:
dynamic equation: cx' + kx = M x''
but the Mass is unknown and it's the problem.
Please help
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