Engineering, 19.07.2019 20:30 diamondgodbee123

Aflexible machine part was observed to vibrate excessively at 20 hz due to a harmonic force of unknown amplitude. it was concluded that vibration was large because the harmonic force coincided with the natural frequency of the flexible part. when the harmonic force was not present, a 0.5 kg mass was placed on the flexible part and a static displacement of 3.0 mm was observed. the mass was then removed. a) the flexible part is to be modelled as a one degree-of-freedom, mass-spring-damper system. what mass and stiffness would be appropriate? b) a tuned vibration absorber is used to eliminate the vibration at 20 hz. if a mass of 0.03 kg is used for the absorber, what stiffness is required? c) if the amplitude of the absorber mass at 20 hz was observed to be1 cm, what is the amplitude of the harmonic force acting on the flexible part?

Answers: 2

Show answers

Other questions on the subject: Engineering

Engineering, 04.07.2019 18:10, jadeochoa4466

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Answers: 2

continue

Engineering, 04.07.2019 18:10, bckyanne3

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

Answers: 1

continue

Engineering, 04.07.2019 18:10, krystabrewer3

What are the two (02) benefits, which may result from a successful implementation of preventive maintenance (pm) program in an organization? (clo3)a)- lean manufacturing b)-overlapping responsibilities c)-the planner is not qualified d)-accurate contractor information e)-reduction in equipment redundancies f)-accurate stores information

Answers: 3

continue

Engineering, 04.07.2019 18:20, moneywaydaedae

Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis

Answers: 1

continue

You know the right answer?

Aflexible machine part was observed to vibrate excessively at 20 hz due to a harmonic force of unkno...