(. 3.11) 1 m2 = 20 , 2 m2 = 2 , m= 0,5 , (=2/3 ).
1=2103/, 2=3103/, 3=4103/ .
0=2 ν0 = 3 / . ω = 1/2ρ (ρ ) .
( , T ) ( ) .
3.11
.
,
13 = 13 /(1+3) = 21034103/(2103+4103) = 4/3103 /.
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3.12
(. 3.11): 1, 2, . (. 3.12), 2 φ . ij ( ) F. ,
F= ѷ (+λ), (3.1)
λ ,
λ= (P1+2P2+2PA) /C,
P1,P2,PA 1,2 .
,
p k= (m )
(.3.12) .
(3.2)
, (3.3)
Q
. (3.4)
, 2 (.3.12).
(3.5)
,
.
(3.4), (3.5), :
Q= ( +2m 2 +2m )-( m 2 + m ) (3.6)
ϳ Q (3.6) Fxe (3.3) (3.2), :
.
, (3.7)
(3.7) 1 + 1 =0, :
1=B1coskt + B2 sinkt (3.8)
2 (3.7), :
2=B3 cosωt. (3.9)
(3.7) (3.9), B3
- ω2B3cosωt + k2B3cosωt = h0cosωt,
.
(3.7)
(3.10)
B1 B2 :
|
|
.(3.11)
V (.3.12)
(3.10), (3.12) (3.11) B1 B2 .
-0,02 = B1+0,007, 3 = 22,86 B2. B2 = 0,13 ; B1 = -0,027.
(3.10) :
x=-0,027cos(22,86t) +0,13sin(22,86t)+0,007cos(11,43t). (3.13)
3.13
.3.13 , (3.13).
³: