.
1. .
2. .
η1 = 0,95, η2 = 0,97, η3 = 0,95 η = 0,99:
η.=η1 × η2 × η3 × η3 =0,95 × 0,97 ×0,95 × 0,993 = 0,849.
3. :
= F × V= 5,25 × 1,35= 7,087.
4. :
= /η = 
= 8,34 .
5. :
u 
=2 × 3 ×3 = 18; u 
= 4 × 6 × 6 =144.
6. :
n = 
= 
= 64,49 -1;
ω= 
= 6,75-1.
7. :
n 
= n× u = 1160,82 -1;
n 
= n × u 
= 9286,5 -1.
8. .
13244:
= 11 ; n = 1500 -1; S = 2,8%;
n = nc × 
= 3000 
= 1458 -1;
9. :
u = 
= 
= 
= 22,6.
10. .
u2 = 3,15, u3 = 3.
: u1= 
= 
=2,39.
u1= 2,4:
u = u1 × u2 ×u3 = 2,4 × 3,15 × 3 = 22,7.
δ = 
= 0,35% < 3% (δ = 3%).
11. :
1- :
n = n1 = 1458 -1, ω = ω1 = 152,604 -1;
= 1 = / ω1 =8,348 × 103 / 152,6 =54,7ͷ.
2- :
n2 = 
=1458 / 2,4 = 607,5 -1 , ω2 = 
= 63,6 -1;
2 = 1 ×u1 ×η1× η = 54,7 × 2,4 × 0,95 × 0,99 = 123,4 ͷ.
3- :
n3 = 
= 607,5 / 3,15 = 192,8 -1, ω3 = 
= 20,18 -1;
3= 2× u2 ×η2 ×η = 123,4 × 3,15 ×0,97 × 0,99 = 373,27 ͷ.
4- :
n4 = 
= 192,8 / 3 = 64,28 -1, ω4 = 
= 6,72 -1;
4= 3 × u3 × η3 × η = 373,2 ×3 × 0,95 × 0,99 = 1053,2 ͷ.
12. :
F = 2×4 / D = 2 × 1053,2 / 0,4 = 5,265 = 5,25
, .
2- .
1. .
. :
D1 = / 34 / × 
, 1 = ͷ.;
D1 = / 34/ × 
= 4 × 37,96= 151,841 .
D1 = 160 .
:
D2 = D1×u1 = 160 × 2,4 = 384 .
:
Ft = 
= 
= 683,75 .
Fn = 2,05 .
:
d1 = 
, 2 - ͷ.
.
: σ = 300 = 2,4;
|
|
|
σ = 800 = 1,8.
: σ = 600 = 1,5;
σ = 950 = 1,2.
6: σ = 450 .
, :
= 2,22.
d1 = 2,22× 
= 74,3 .
d1 = 75 .
:
d2 = d1 × u2 = 75 × 3,15 = 236,25 .
Ft = 
= 
= 3159,9 .
Ft = 3,16 .
Fr = Ft × tg 20º =3,16×0,364 = 1,15 .
2. .
.
Z1 
11.
Z1
Z1 = 31 2×u =31 2 × 3 = 25.
:
Z2 = Z1 × u3 = 25 × 3 = 75.
Z2 120 . .
, ,
Fn = b ×Ft + 2×F0.
b .
b = 1,05.
:
Ft = 
, d = 
.
:
= 12,7; 15,875; 19,05; 25, 4; 31,75; 38,1; 44, 45; 50,8 .
, . , .
F0 , . F0 Fn Fn 5%.
= 38,1 .
:
d = 
= 
= 304,8
: Ft = 
= 2449,3 .
1,05 :
Fn = 1,05×1,05×2449,3 = 2700,3 .
Fn = 2,7 .
