, . - X(t), :
, X(t)
F=F0 cos w t. (147.1)
(147.1) (146.9)
m̈ = - kx rx + F0 cos wt.
(142.2) (146.10),
(147.2)
, X(t) ...
(147.3)
(143.2) (147.3)
(143.4) (146.11),
(147.4)
, ..., .
(147.2) (147.4)
(147.5)
(x0 F0/m, Um/L).
(147.5) (146.5) (146.1) . (. 140). (147.5)
(147.6)
s (s = ihs0eiht, s̈ = - h2s0eiht) (147.6),
(147.7)
, t . , h = w. , (147.7) s0
:
(147.8) (147.9)
, (147.6)
, (147.5),
(147.10)
j (147.8) (147.9).
, (147.5)
(147.11)
(147.5)
(147.12)
(. (146.5)) (147.11). (147.12) ( ) , , (147.8). . 209. , ; , (147.8) (147.9), w.
|
|
. 209
(147.10), (147.8) (147.9) , , w20 = l/(LC) (. (143.4)) d = R/(2L)(. (146.11)):
(147.13)
Q = Qmcos(wt - a) no t, :
(147.14) (147.15)
(147.14)
j = a - p/2 (. (147.3)). (147.13)
(147.16)
(147.16) , (j > 0), wL > 1/(w0), (j < 0), wL < l(wC).
(147.15) (147.16) . 149 .