- - , , I1, I2, II2, II3, II4, II5,
smax £ bRu / gu, (118)
smax , jb;
b , . 84.
, , , , . 5 .
11.1*.
, (119)
t ;
lw , , 2 t, .
, . 5.2. (119) Rwy Rwu / gu.
. 2, .
11.2*. () (. 20):
. 20.
1 ; 2
( 1)
N /(bf kf lw) £ Rwf gwf gc; (120)
( 2)
N /(bz kf lw) £ Rwz gwz gc, (121)
lw , 10 ;
bf bz , : 530 (5400 /2) . 34*; 530 (5400 /2) , bf = 0,7 bz = 1;
gwf gwz , 1 , , I1, I2, II2 II3, gwf = 0,85 Rwun = 410 (4200 /2) gwz = 0,85 .
, , 285 (2900 /2) . 3.4 , Rwf Rwz, 1,1 Rwz, Rwz bz / bf; 285 (2900 /2) , Rwz < Rwf £ Rwz bz / bf.
|
|
, . 55*.
11.3*. , , :
; (122)
, (123)
Wf ;
Wz , .
:
; (124)
, (125)
Jfx Jfy ;
Jzx Jzy , ;
, , .
11.4. , , (33), sx, sy, txy Ry : sx = swx sy = swy ; txy = twxy ; Ry = Rwy.
11.5.
tf £ Rwfgwfgc tz £ Rwzgwzgc, (126)
tf tz , , .
11.6. N, , .
11.7*. Nb, , :
Nb = Rbs gb Ans; (127)
Nb = Rbp gb d å t; (128)
Nb = Rbt Abn. (129)
, (127) (129):
Rbs, Rbp, Rbt | ; |
d | ; |
A = p d 2/4 | - ; |
Abn | ; Abn . 1 2235677*; |
å t | , ; |
n s | ; |
gb | , . 35*. |
35*
|
|
gb | |
1. : | |
1,0 | |
, | 0,9 |
2. a = 1,5 d b = 2 d , (/2): | |
285 (2900) | 0,8 |
. 285 (2900) 380 (3900) | 0,75 |
, 35*: a ; b , ; d . : 1. , . 1 2, . 2. a b, . 2 . 39, gb . |
gc . 11.8.
11.8. n N
, (130)
Nmin , . 11.7* .
11.9. , , .
11.10. , , .
, , .
11.11. , 10 %.
, , 50 %.