Page 24 - Mechanical Engineers Reference Book

Vibrations 1/13

No damping

I
Moderate damping
-.
\Cri?ical
damping

1 .o 2.0 3.0 0 1 .o 2.0 3.0 4.0
Frequency ratio (w/w,) Frequency ratio (dun)
(a) (2)

No
/ damping
180"
(u -
m
m Moderate damping
Critical damping H 90"
r
Q

1 2 3 4 0 1.0 2.0 3.0 4.0
Frequency ratio (dun) Frequency ratio (w/w,)
(b) (b)

Figure 1.18 Figure 1.20

I
I m
M I

Figure 1.19 Figure 1.21