A vibration system with m = 2 kg, c = 5 N-s/m and k = 200 N/m is excited by a step force f1 = 2 N with a time delay = 1 second and an impulse force f2 = 1,500 N with duration = 0.001 second. Find the corresponding response. Assume initial displacement is 0.01m. The initial velocity is zero.
6 A vibration system has mass 2kg and damping ratio 5%. Excited by a force with amplitude 10 N and driving frequency 10 rad/s, it resonates (r =1).
Find damping coefficient c and stiffness k.
Calculate the amplitude of the displacement of steady state response, X
The amplitude X is to be reduced toX/2 whereas m and k remain unchanged, determine proper value of c.