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REPORT
¡ù?? ??
??? ?? ??? ???? ?? ??? ????. ??-????? ????(free vibrations of rigid body-spring system), ??-????? ??????(free damped vibration of rigid body-spring system), ??-????? ??????(forced damped vibration of rigid body-spring system) ??? ??? ?? ??? ??? ?? ?? ?? ?? ??? ????.
¡ù?? ??
???? ??(TM16, TQ Education and Training LTd)
1? ?? : ??-????? ????(free vibrations of a rigid body-spring system with negligible damping)
1. ??? ??
?? - ????? ????
? ???? ?? m? ? AB? ??? ??? ???? ?? ???? C??? ??? S? ???? ??. ??? ???? ???? ??? D?? ???? ??? ??? ??. ??? ?????? ???? M??.
??? ????(angular motion equation)? ??
??(pivot) ?? ?? ?? ???(moment of inertia)?
where : = Angular displacement of the beam
where : = Angular velocity of rotation to the discs
where : = Maximum value of the disturbing force ??.
? ?? ???? ? ?? ??? ?? ? ??.????
¡¤ ????
-
????
Ai ???????? ??? ??? ??? ???? ?? ?? ??? ?????. ??? ?? ??? ? ?? ??? ?? ?? ?????. ??????. -
??????? ??? ??? ???
? ?????
-
??? ?? ? ??? ???? ??? ?????? ???? ???, ?? ?? ? ??? ???? ?? ?? ??? ?? ????? ????.
?? ? ??? ??? ??? ??, ?? ?????? ???? ????.
?????, ???? ? ?? ?? ?? ? ????? ????? ????? ??? ??? ????. -
?????? ???? ??? ??? ???? ???? ??? ???? ???, ??? 4?? ???? ??? ? ?????? ????.
???? ???? ??? ?? ??? ?? ?? ??? ??? ????? ??? ?? ??? ????? ?? ?????? ?? ???? ?? ?? ?? ??? 70% ?? ??? ???? ?? (???? ??? ? ?? ?? ???) ???? ?? ???, ????, ??, ?? ?? ??? ??? ?? ??? ??? ?? ??? ??? ???? ?? ??
?? ??? ??? ??? ???!
-
????
5???
. . where x p is the amplitude of the first peak of the step response and x f is the settling amplitude. X P? ?? ??? ?? F? ? ?? ??? ????? ?? ?? ????. Then the damping ratio is ?? ?? ?? ?????. X P .. -
????
13???
(1) ?? ?? ??? ?? ??? ???? ?? ??? ????. ??-????? ????(free vibrations of rigid body-spring system), ??-????? ??????(free damped vibration of rigid body-spring system), ??-????? ??????(forced damped ..
-
?? ??
7???
¡ù ???? : ??? ??? ??? ??? ??, ??? ?? ? ?? ???? ???? ????, ???? ???¡¤??? ??? ?? ??(¹²Õñ)???? ??. ????? ???? ???? ???? ? ?? ?? ??? ? ? ?????? ???? ??????? ???? ??? ? ??? ???? ??? ???. ? ???? ?? ..
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11???
??? ??? ???(18N/m)? ???? ??? ?? ?? ???-?? ???? ??? ??? ??? ????, ??? ???? ?? ??? ????? ?? ??? ????? ??? ???? ??. ? ? 1??? ????? ???? ???? ????? ???? ???? ?? ??? ? ??. ? ?? ??? ?????? ??? ???????. ?.. -
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9???
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