Evaluate the mechanical impedance seen by the applied force drivi…
Evaluate the mechanical impedance seen by the applied force driving a simple harmonic oscillator with an infinite string extending transversely from the mass.
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Technifi Expert’s Answer:
For the greatest swing amplitude, the frequency of the pushes must be near the resonant frequency of the system.
F(w) = Z(w)v(w)
Where, F is the force vector, v is the velocity vector, Z is the impedance matrix and w is the angular frequency.
a =jwv = -w2 d
v = \OJ6 ~ (1/jw)a
d = (1/jw) v – (1/-w2 )a
here wj = 2ni and f is the frequency of vibration
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