N=2
Ip= =95
F= , (66)
j- , /2;
I - , , ;
F - , 2.
j =1,0 /2
F= =95 2
-120 I.=390 :
ro=0,249 /
xo=0,427 /
bo=2,6610-6 /
(67) (68).
Ip I. (67)
I I. (68)
I , .
I =2Ip
I =295=190
95 <390
190 <390
, , , -110 70 2. .
-120 I.=390 .
-110
( ).
-110 (69).
Imax I, (69)
Imax- , ;
I- , .
Imax=175
-110 -120 I=390 q=120 2 /5,582/. :
1)
qmin q, (70)
qmin , 2.
qmin= , (71)
B , 2;
, / .
B =1,7 2. =91 / .
qmin= =14 2
2)
35 .
0,9 1,07, (72)
- , , /;
- , /.
=30,3m(1+ ), (73)
m , ;
ro , ;
- , , /.
ro=0,76
m=0,82.
Eo= 30,30,82 (1+ )=33,37 /
= , (74)
U , ;
- , /;
D , .
U=110
D=1,26D, (75)
D , ;
D , .
110 D=300
D=1,26300=378
= =19 /
0,933,37 1,0719
30,03 />20,33 /
-110 -120 I=390 q=120 2 ro=0,76 .
|
|
4.
. , .
-35
-35 .
-35 -70 I=265 q=70 2 ro=0,57 .
4.
-6
-6 . 3000 -6 . -6 . , . , 6-10 0,6-0,8 , 1,0-1,5 .
-6 hxb=40x5 31 =91 I =540 .
-6 (69) (70). , (68).
Imax=391
qmin= =57 2
, , , . , . , f >200.
f = , (76)
l , ;
J , , ;
f0 - .
:
J= (77)
J , , ;
b , ;
h ,.
J= =2,7
l =1 2
l=1
=0,6
, (78)
- , , ;
- , .
, :
W= (79)
W , , ;
b , ;
h ,.
W= =1333
i =12,95
(80)
W , , ;
l , ;
=3,6
. 4.
.
-110
-110 , . -110 . . -110 8 -70212W.
|
|
-35
.
-35 . -35 5 -70212W.
-6
-6 ( ) .
1) (51).
U=10
U=10
2)
F , (81)
F -, , ;
F - , .
F =0,6F , (82)
F - , ;
F - , .
:
F = , (83)
- , ;
l , ;
=0,6
l=1,0