Answered: Fo sinot

Engineering

Mechanical Engineering

Fo sinot

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter1: Basic Modes Of Heat Transfer

Section: Chapter Questions

Problem 1.71P: 1.71 The thermal conductivity of silver at 212°F is 238 Btu/h ft °F. What is the conductivity in SI...

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Concept explainers

Free Damped Vibrations

Free vibration is a type of vibration in which the external force is removed after giving the initial displacement to a body/system. In other words, in this type of vibration, force is applied at the initial displacement of the system, and after the initial displacement, force is removed, and the system vibrates at the natural frequency.

Question

(machine dynamic )

The mass(20 kg)-damper-spring system given in the figure on the right is under a harmonic force.
a- Obtain the equation of motion by making the necessary assumptions for this system.
b- Find and interpret the natural frequency, damping state (critical etc.), damping constant and damping degrees of the system using the values given in the table.
c- Compare the situation at t=5s and t=20s. What changes have occurred?

k (N/m)
c (kg/s)
F (N)
w (rad/s)
110
26
860
48

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