Question

3) The foot bridge shown is expected to be excited at 2 Hz by the average human gait. Assuming an excitation force amplitude of 600 Ib, design a tuned vibration absorber to counter the excitation while having its own steady-state vibrations less than 3 inches. Keep the absorber mass less than 750 lb. ka

Answer 1

32 2 dt ko や匀"J 12 36+8.1 X 2xS s 0.326 750 82.2 С 190.84 kb-s