, . - , , . , , . (, , )
F = -rv (56)
r ( ), . , (56) .
, . , , ΔE T , ..
Δ/ << 1. (57)
ΔE
ΔE = <F> ΔS = r <v2> T = -2 < > T, (58)
< > - ( ) ,
< > = . (59)
(58) (57),
= - 2β = - ,
β = r/2m - .
, (56)
E = E0 e-2βt, (60)
E0 - .
. , , . , , . ( ) . ,
= F0 cos ωt (61)
ω. , ; .
ma = - kx rv + F0 cos ωt. (62)
x(t) = A cos (ωt - φ) (63)
A , φ .
, F0, ω0, β , , ω. .15 ω β. ( ), , , , . ω = ω0
|
|
max = (64)
. , . . 15 .
max , () , F0. (63) , ω = 0 ( ω = 0 = F0 cos ωt = F0)
= (65)
(66)
, ( ) . . : , , , .
(buffet , ). , . , , , , , , .
.15. ( , max , ω0 , )
:
- (ω0 > β);
- , ;
- ( ) ( (. )).