Machine A with mass = 1800 kg and natural frequency at 13.33 Hz is experiencing heavy vibration
Question:
Machine A with mass = 1800 kg and natural frequency at 13.33 Hz is experiencing heavy vibration propagated from the floor. Currently, there are 6 isolation mounts being used between the machine and the floor and they carry the weight of the machine evenly. Each of these mounts behaves as shown in the figure. A hydraulic pump mounted directly on the floor right next to Machine A is the cause of the vibration. When the hydraulic pump is running at steady state, an accelerometer mounted on Machine A detected vibrations at 10.0 m/s2 and 13.0 Hz oscillation frequency. It is assumed that the cause of the vibration cannot be removed or changed. [15] Calculate the steady state displacement amplitude of Machine A when the hydraulic pump is running. Your boss suggested that if the # of isolation mounts is reduced from 6 to 5, the vibration amplitude on Machine A will be reduced. Calculate the new displacement amplitude of Machine A. Is your boss correct? |
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self