12.1, , .
, . 1.. VII; .
= 4,97.
z 3 = 31 2 = 31 2 × 4?97 21.
z 4 = z 3 21 × 4,97 = 104,37.
z 4 = 104.
.
[. (7.38)] , 12.1, = 1,25.
2 = 306 / . 7.18 [ ] = 20 .
. 7.15 t = 31,75 ; Q = 88,50 ; q = 3,8 /; A = 262 2 ( 13568-75).
: (7.39)
. 7.18 [ ] = 19 [1 + 0,01(21 - 17)] 20 ; £ [ ] .
, :
F t = 3800 ;
Fv = qv2 = 3,8 × 3,412 44 ;
[. . 154) kf = 1,5; q = 3,8 /;
:
d 1 = 19,05 (. . 7.15).
, (7.40):
, [ s ] = 9,4 (. . 7.19); , s ³ [ s ] .
:
d 3 = 1,6 × 48 = 78 ; l 3= (1,2¸1,5) 48 = 58¸72 ; l 3= 70 .
0,9 3 = 0,93 × 19,05 = 18 , = = 19,05 (. . 7.15).
VII. (. . 12.15)
12.1.
: ; . , , . , .
.
- 1 (594 841 ). 1: 1. . . d1 = 1734' R = 166 .
|
|
. . , .
.
(. . 7):
d | D | T | C | C 0 | e | |
46,5 | 32,5 | 0,38 0,41 |
, = 10 ; 1 = 15 ( ).
- , , (. . 9.21). (9.11)
f 1 = 55 + 18 = 73 .
c 1 (1,4¸2,3) f 1 = (1,4¸2,3) 73 = 102¸168 . c 1 = 120 .
, = 10 2 = 20 ( ).
7211 22 .
o . = = 1 1 5 . .
f 2 = 71 2 = 159 ( , ' + = 2 + f2).
, , 1,5 x, . . 15 .
( 2 ) , l 3 = 100 .