 |
7.1 .
40.
7.2 .
[ t ] = 1020
[ t ] = 15 ;
[ t ] = 20 .
7.3 .
| d; l. | - | ||
| 1- | d 1 |  ,
1 = 26,5 ∙
|  ,
2 = 101,8 ∙
|
| l 1 | l 1 = (11,5)∙ d 1 = = 20,631 = 25 | l 1 = (0,81,5)∙ d 1 = = 25,648 = 40 | |
| 2- | d 2 | d 2 = d 1 + 2 t; t d 2 = 20 + 2∙2 = 24 = 25 d 2 = 32 + 2∙2,5 = 37 = 40 | |
| l 2 | l 2 = 1,5∙ d 2 = 37,5 = 40 | l 2 = 1,25 d 2 = 1,25∙40 = 50 | |
| 3- , | d 3 | d 3 = d 2 + 3,2 r; r - r = 1,6 d 3 = 25 + 3,2∙1,6 = 30,1 = = 32 | d 3 = d 2 + 3,2 r = 40 + 3,2∙3 = = 49,6 = 50 |
| l 3 | |||
| 4- | d 4 l 4 | d 4 = d 2 = 25 l 4 = B + c = 15 + 1= 16 | d 4 = d 2 = 40 l 4 = B + c = 23 + 2 = 25 |
.
)
)
7.4 .
7.2 , -27 .
w < 200 : , , 3 ().
| d | D | B | r | Cr, | Cor, | |
| 1,5 | 6,95 | |||||
| 2,5 | 22,4 |
8.
Ft 1 = 1300 ; Fr 1 = 473 H; FM = 700 H; d 1 = 20 ; l = 83 ; l = 58,5 .
( ).
1. 
:
) :
:
) 14, ∙.
1 = 0; 2 = 0; 
; 4 = 0
2. :
) :
- , .
: 
700 543,3 1300 + 1143,4 = 0;
0 = 0.
) Y 14, ∙.
MY 1 = 0; MY 2 = - FM∙lM = -700 H∙0,0585 = -41 ;
MY 4 = 0.
3. :
4. :
|
|
|
5. :
Ft 2 = 1300 ; Fr 2 = 473 H; F = 2902,7 ; d 2 = 40 ; lT = 91 ; l = 57,5 .
( ).
1. 
:
) :
:
) 14, ∙.
1 = 0; 
;
3 = 0; 4 = 0
2. :
) :
- , .
: 
2902,7 + 1184,1 + 1300 5386,8 = 0;
0 = 0.
) Y 14, ∙:
MY 1 = 0; 
MY 3 = RDX∙lT = = -1184,1 H∙0,091 = = -107,8 ; MY 4 = 0.
3. :
4. :
5. :
