Q1) A fixed-fixed steel beam, of length 5 m, width 0.5 m, and thickness 0.1 m, carries an electric motor of mass 75 kg and speed 1200 rpm at its mid-span, as shown in the figure. A rotating force of magnitude Fo- 5000 N is developed due to the unbalance in the rotor of the motor. a) Find the amplitude X of steady-state vibrations by disregarding the mass of the beam. b) Identify the difference in this amplitude X, if we introduced damping of a damping ratio ( = 0.3 c) What will be the amplitude if the mass of the beam is considered? d) Identify the difference in this amplitude X, if we introduced damping of a damping ratio = 0.3 e) Name the damping cases, (<1,5 = 1 and (>1 aut Fo mm.

Q1) A fixed-fixed steel beam, of length 5 m, width 0.5 m, and thickness 0.1 m, carries an electric motor of mass 75 kg and speed 1200 rpm at its mid-span, as shown in the figure. A rotating force of magnitude Fo- 5000 N is developed due to the unbalance in the rotor of the motor. a) Find the amplitude X of steady-state vibrations by disregarding the mass of the beam. b) Identify the difference in this amplitude X, if we introduced damping of a damping ratio ( = 0.3 c) What will be the amplitude if the mass of the beam is considered? d) Identify the difference in this amplitude X, if we introduced damping of a damping ratio = 0.3 e) Name the damping cases, (<1,5 = 1 and (>1 aut Fo mm.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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