Date post: | 21-Apr-2015 |
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��ا � ��ن ا���را������ �� ه�ا ا��� تو�رج ���� •0.05ζا�'&��%�� ا��� ت$# ا����� ��! اه ���� �"! =
2 . .nc m ω ζ=
• !"� (�)natural frequency of damped
vibration
20119181482
n
21d nω ω ζ= −
dω
ن ا����� � ��� �� ه�� ا�.
. .0 00
. .. cos . sin . . n tn
d dd
u uu u t t e ζ ωω ζω ω
ω− += +
20119181482