The seismic instrument shown is attached to a structure which has a horizontal harmonic vibration at 3 Hz. The instrument has a mass m = 0.5 kg, a spring stiffness k = 20 N/m, and a viscous damping coefficient c = 3 N ∙ s/m. If the maximum recorded value of x in its steady-state motion is X = 2 mm, determine the amplitude b of the horizontal movement x_B of the structure.

Transcribed Image Text:

kx- -XB' www m k Structure