Determine the natural frequency, amplitude of vibration, and maximum normal stress in the simple…

Determine the natural frequency, amplitude of vibration, and maximum normal stress in the simple supported beam carrying an engine of weight it* – 30 KN (Figure P3.13). Thc engine rotates at 400 rpm and induces a vertical force  (Problem contributed by Vladimir N. Alekhin and Alckscy A. Antipin of the Urals State University, Russia)

 

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