5- 3 Problems and Solutions Section 5.1 (5.6 through 5.26) 5.6 A 100-kg machine is supported on an isolator of stiffness 700 103 N/m. The machine causes a vertical disturbance force of 350 N at a revolution of 3000 rpm. The damping ratio of the isolator i
5- 23 Problems and Solutions Section 5.3 (5.27 through 5.36) 5.27 A motor is mounted on a platform that is observed to vibrate excessively at an operating speed of 6000 rpm producing a 250-N force. Design a vibration absorber (undamped) to add to the plat
5- 35 Problems and Solutions Section 5.4 (5.37 through 5.52) 5.37 A machine, largely made of aluminum, is modeled as a simple mass (of 100 kg) attached to ground through a spring of 2000 N/m. The machine is subjected to a 100-N harmonic force at 20 rad/s.
5- 53 Problems and Solutions Section 5.5 (5.53 through 5.66) 5.53 Design a Houdaille damper for an engine modeled as having an inertia of 1.5 kg.m2 and a natural frequency of 33 Hz. Choose a design such that the maximum dynamic magnification is less than
5- 72 Problems and Solutions Section 5.6 (5.67 through 5.73) 5.67 Compare the resonant amplitude at steady state (assume a driving frequency of 100 Hz) of a piece of nitrite rubber at 50F versus the value at 75F. Use the values for from Table 5.2. Solutio