Q.5The rotating unbalance of a 185 kg machine is 0.65 kg.m. The machine is paced at the midspanof a 2.5-m-long simply supported beam. The machine operates at a speed of 1480 rpm. The beamhas an elastic modulus of 210 x 10 N/m² and a second moment of area of 2.3x10 m(a) What is the steady-state amplitude of the primary system without an absorber?(b) Design the dynamic vibration absorber of minimum mass such that, when attached to themidspan of the beam, the vibrations of the beam will cease and the steady-state amplitude of theabsorber will be less than 2 cm.(25%)

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Answered: Q.5 The rotating unbalance of a 185 kg…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Theoretical value of frequency Wn = L (@n)? = *thread length=28cm Practical value of frequency No. Tmain (sec) = total time/5 time for (5) oscillations 1 T, =5.37s 2 T2 =5.64s 3 T3 =5.31s 4 T4 5.35s 5 T5 5.73s Tmain Tn = 1 fn = Tn Wn = 2 n fn Compare (wn) the result of a theoretical experiment with a practical one
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