9.1.
. 6. :
Ft= 4273 ;
Fr= 1595 ;
Fa= 971 .
, , : F= 667,3 .
l1 =87 , l0 =80.
.
, Ft F :
z
Rx1 = [Ft∙l1 + F∙(l0 +2l1)]/2l1 = [4273 ∙ 87 + 667,3 ∙(80 + 2 ∙ 87)] /2 ∙ 87 = 3110,6 ;
Rx2=(Ft ∙l1 F∙l0)/ 2l1 = (4273 ∙ 87 667,3 ∙ 80) / 2 ∙ 87 = 1829,7 .
:
(Rx1 + Rx2) (Ft + F) = (3110,6 + 1829,7) (4273 + 667,3) = 0.
z
Ry1= (Fr l1+ Fa d1/2)/2l1= (1595 ∙ 87 + 971 ∙ 66,7/2) /2 ∙ 87 = 984 ;
Ry2= (Fr l1 Fa d1 /2)/2l1= (1595 ∙ 87 971 ∙ 66,7/2) /2 ∙ 87 = 611 .
:
Ry1 + Ry2 Fr= 984 + 611 1595 = 0.
. 6.
:
r1= (Rx12 + Ry12)1/2 = (3110,62 + 9842)1/2 = 3263 ;
r2= (Rx22 + Ry22) 1/2 = (1829,72 + 6112)1/2 =1929 .
9.2.
1.
308; d= 40 ; D= 90 ; = 23 ; = 41,0 ; = 22,4 (. . 2.16).
:
=(VPr1 + YPa1) KsKT,
Pr1 , Pr1 = 3263 ;
Pa1 , Pa1 = Fa = 971 ;
V , , ; V = 1;
Ks = 1, KT = 1.
Fa/ = 971 / 22400 = 0,043,
@ 0,25 (. . 2.17).
Pa1 / Pr1 = 971 / 3263 = 0,298 > ;
X= 0,56 Y= 1,8 (. . 2.17).
:
= (0,56 ∙ 1 ∙ 3263 + 1,8 ∙ 971) ∙1 ∙ 1 = 3575 .
:
L= (C/ ) 3= (41000 / 3575)3 = 1508 . .
:
16162 ( ) 40000 . . 16162 10000 [3, c. 158].
.
9.3.
. 7. , :
Ft=4273 ;
Fr=1595 ;
Fa=971 .
l2 = 90 , l3 = 86 .
.
. .
|
|
:
Rx3= Rx4= Ft /2 = 4273 / 2 = 2136,5 .
:
Ry3= (Fr l2 + Fa d2/2) / 2l2 = (1595 ∙ 90 + 971 ∙ 333,3 / 2) /2 ∙ 90 = 1696 ;
Ry4= (Fr l2 Fa d2 /2)/2l2= (1595 ∙ 90 971 ∙ 333,3 / 2) /2 ∙ 90 = 101 .
:
Ry3 + Ry4 Fr= 1696 + (101) 1595 = 0.
3:
r3= (Rx32 + Ry32)1/2 = (2136,52 + 16962)1/2 =2728 .
4:
r4= (Rx42 + Ry42) 1/2 = (2136,52 + 1012)1/2 = 2139 .
. F, .
- F,
F=0,2 (2 103/d) = 0,2 ∙ 2 ∙ 712,5 ∙ 103 /196 = 1454 ,
:
d = t/sin(180º/z) = 50,8/sin(180/12) = 196 ,
t 50,8 ; z 12.
. 7.
. .
:
r3∑ = r1+ F= 2728 + 1454 = 4182 ;
r4∑ = r2+ F= 2139 + 1454 = 3593 .
3 (r3∑ = 4182 ).
9.4.
313 : d = 65 ;
D = 140 ;
= 33 ; = 92,3 ; = 56,0 (. . 2.16).
Fa/ = 971 / 56000 = 0,017; @ 0,19 (. . 2.17).
Fa / Pr3∑ = 971 / 4182 = 0,232 > e, ,
X= 0,56, Y= 2,2 (. . 2.17).
=(VPr3 + YPa1) KsKT = (0,56 ∙ 1 ∙ 4182 + 2,2 ∙ 971) ∙1∙1 = 4478 .
:
L= (C/ )3 = (92300 / 4478)3 = 8757 . .
:
.