I ( 6.6) =(12-5w) ͷ.
I () t1=2c, r1=0,4m; r2=0,2m; r4=1,0m. 1 2 3 : m1=1, m2=2, m3=3. , ( I) .
. ( 6.6) ( 6.7) 䳺 : ; 1 1; 4 SA, NA, SB, NB; P1, P2, P3 ( . 6.7).
I 㳿
6.1
6.2
6.3
6.4
6.5
6.6
(6.1)
, Ne Ni .
, (Ni=0).
ʳ 㳿 1, () 2 3.
(6.2)
1 ,
(6.3)
- , 1, w1 1.
( 2 3) :
(6.4)
6.7
Vc 2 3, - 2 3 , w2=w3 ( 2 3).
Vc, I. (. 6.7) 2 3, ,
, , (6.5)
I.
(6.6)
(6.5), (6.6).
, (6.7)
, (6.2), (6.3) (6.4), (6.6) (6.7),
(6.8)
(6.9)
(6.1) (6.8) (6.9) :
(6.10)
M=(12-5 w) , 䳺 I.
, (6.11)
:
t=0, w=0. (6.12)
(6.11) w t.
(6.13)
(6.13) (6.12).
:
(6.14)
I t1=2c
, - 3.