(. . VII. . 7.15).
3 = 2 = 625 × 103 .
= 3,14
: [. . 148]
z 3 = 31 - 2 = 31 2 . 3,14 25;
z 4 = z 3 = 25 . 3,14 78,3.
z 3 = 25 z 4 = 78.
[. . VII, (7.38) ].
= k kk k k k = 1 × 1 × 1 × 1 × 1,25 × 1 × 1 = 1,25,
k = 1 ( ); k = 1 [ k = 1 £ (30¸60) t ]; k = 1 (k = 1, 60; g = 45, . . 12.1); k ; k = 1,25 ; k = 1 ; k , k = 1.
.
200 / [ ] = 23 .
( = 1)
. 7.15. -31, 75-88, 50 13568-75, t = 31,75 ; Q 88,5 ; q = 3,8 /; = 262 2.
(7.39)
. 7.18 [ ] = 22 [1 + 0,01 (z 3 - 17)] = = 22 [1 + 0,0,1 (25 - 17)] = 23,76 . < [ ] . 22 . 7.18 = 200 / t = 31,75 .
(7.36)
; z S = z 3 + z 4 = 25 +78 = 103.
Lt = 152.
(7.37)
0,4%, .. 1562 × 0,004 6 .
[. (7.34)]
[. (7.35)]
d 1 = 19,05 mm (. . 7.15);
, :
|
|
Ft = 4950 ;
Fv = qv2 = 3,8 2,562 25 , q = 3,8 / . 7.15;
Ff = 9,81 kf qa = 9,81 1,5 3,8 1,562 = 88 , kf = 1,5 45.
F B = Ft + 2 Ff = 4950 + 2 88 = 5126 .
[ (7.40)]
, [ s ] 9,4 (. . 7.19); , s > [ s ] .
:
d = 1,6 . 55 = 88 ; l = (1,2¸1,6) 55 = 66¸88 ; l = 85 ;
0,93 = 0,93 19,0518 , (. . 7.15).
.