A 100 kg flow monitoring device is placed on a table in a laboratory. A pad of stiffness 2 x 105 N/m and damping ratio 0.051 is placed between the apparatus and the table. The table is bolted on the laboratory floor. Measurements indicate that the floor has a steady state vibration amplitude of 0.8 mm at a frequency of 50HZ. What is the amplitude of acceleration of the flow monitoring device?

[6] An instrument panel weighing 30 lb is installed in a vehicle on a flexible mount that has an equivalent stiffness k = 400 lb/in and negligible damping. As a result of engine vibration, the vehicle vibrates with a steady-state amplitude of o.25 in at a frequency of 40 Hz. Determine the steady-state amplitude of vibration of the instrument panel.

Obtain X1(s)/F(s) and then determine the damping coefficient C of the mechanical system below. m2 =160.1 kg, k =953.7 N/m, k, =1,451.7 N/m, b, =148.0 N-s/m. X1(t) x2(t) k2 f2(t) m2 k, b2 massless plate Sonraki

A rail road bumper is designed as a spring in parallel with a viscous damper. What is the bumper's damping coefficient such that the system has a damping ratio of 1.25, when the bumper is engaged by a rail car of 20,000 kg mass. The stiffness of the spring is 200 kN/m. If the rail car engages the bumper, while traveling at a speed of 20m/s, what is the maximum deflection of the bumper? poooo m