question_answer

For lightly damped heavy rotor systems, resonance occurs when the forcing co is equal to: Where \[{{\omega }_{cr}}\] is the critical speed.

A) \[2\,\,{{\omega }_{cr}}\]           

B) \[\sqrt{2}\,\,{{\omega }_{cr}}\]

C) \[{{\omega }_{cr}}\]                             

D) \[\frac{1}{2}\,\,{{\omega }_{cr}}\]