Осцилятор Дуффинга. Астахов В.В - 42 стр.

UptoLike

Рубрика: 

0
˙a exp (
0
t) +
0
α
2
[a exp (
0
t) a
exp (
0
t)]
+
µ
8
a
3
exp (3
0
t) + 3a
2
a
exp (
0
t) + 3aa
2
exp (
0
t) + a
3
exp (3
0
t)
= B
exp (t) + exp (t)
2
0
˙a +
0
α
2
[a a
exp (2
0
t)]
+
µ
8
a
3
exp (2
0
t) + 3|a|
2
a + 3|a|
2
a
exp (2
0
t) + a
3
exp (4
0
t)
=
B
2
exp [i (ω ω
0
) t] +
B
2
exp [i (ω + ω
0
) t]
a(t), ˙a(t),
B
2
exp [i(ω ω
0
)t]
0
˙a +
0
α
2
a +
3µ
8
|a|
2
a =
B
2
exp (t) ,
δ = ω ω
0
a(t)
a(t) = ρ(t) exp [(t)] ,
ρ(t) φ(t)
0
h
˙ρ exp () + i
˙
φρ exp ()
i
+
0
α
2
ρ exp () +
3µ
8
ρ
3
exp () =
B
2
exp (t)
˙ρ +
˙
φ +
α
2
ρ i
3µ
8ω
0
ρ
3
= i
B
2ω
0
cos (δt φ) +
B
2ω
0
sin (δt φ)
ψ = δt φ