# A motor generator unit of mass 150 Kg runs at a constant speed of 1500 rpm. After installation the forcing frequency is found to be close to the natural frequency of the system. Design a dynamic absorber such that :- (A) the natural frequency of the main system is equal to that of the absorber and (b) the ratio of the operating frequency to the natural frequency is 0.9

Question-AnswerCategory: Mechanical EngineeringA motor generator unit of mass 150 Kg runs at a constant speed of 1500 rpm. After installation the forcing frequency is found to be close to the natural frequency of the system. Design a dynamic absorber such that :- (A) the natural frequency of the main system is equal to that of the absorber and (b) the ratio of the operating frequency to the natural frequency is 0.9

A motor generator unit of mass 150 Kg runs at a constant speed of
1500 rpm. After installation the forcing frequency is found to be close
to the natural frequency of the system. Design a dynamic absorber
such that :- (A) the natural frequency of the main system is equal to
that of the absorber and (b) the ratio of the operating frequency to the
natural frequency is 0.9

ਸਾਜਿਦ ਅਹਿਮਦ answered 4 months ago

Given:

m=150 kg

Speed(N)=1500 rpm

ω=2πN/60

=2×3.14×1500/60