The frame consists of a steel beam welded rigidly to two vertical channels. An eccentric exciter weighing 250 N is attached to the beam, which weighs 10 KN and is used to excite the frame. The unbalance weight of the exciter is 25 N and it has an eccentricity of 5 cm. By varying the rotational speed of the exciter until resonance occurs, the maximum horizontal amplitude was found to be 3.75 mm. Assuming no bending on the beam and considering the channels to be completely fixed at both ends, magnification factor at resonance is A. 307.5 B. 3.075 C. 30.75 D. 0.3075

The frame consists of a steel beam welded rigidly to two vertical channels. An eccentric
exciter weighing 250 N is attached to the beam, which weighs 10 KN and is used to excite the
frame. The unbalance weight of the exciter is 25 N and it has an eccentricity of 5 cm. By varying
the rotational speed of the exciter until resonance occurs, the maximum horizontal amplitude was
found to be 3.75 mm. Assuming no bending on the beam and considering the channels to be
completely fixed at both ends, magnification factor at resonance is
A. 307.5
B. 3.075
C. 30.75
D. 0.3075
by

1 Answer

Answer :

C. 30.75
by

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