Question: Example 2 0 . 4 : The exciting force in a constant force - amplitude excitation is 9 0 kN . The natu - ral

Example 20.4: The exciting force in a constant force-amplitude excitation is 90 kN . The natu-
ral frequency of the machine foundation is 3 Hz . The damping factor is 0.30. Determine the
magnification factor and the transmitted force at an operating frequency of 6 Hz .
Example 2 0 . 4 : The exciting force in a

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