.
h = (2,5Vc2/g)(δTc/Ic)0,5 (14)
δ (. , δ=0,75).
:
-
Vc=10,6/ = 10,6*1000/3600 = 2,94/
h = (2,5*2,942/9,81)(0,85*3,6/138) = 2,2*0,02 = 0,04;
-
V = 15,0/ = 15*1000/3600 =4,16/
h = (2,5*4,162/9,81)(0,75*1,9/65) = 4,4*0,02 =0,08
h = β(0,5h + 0,05m2Vc2/g)/(1 0,05m2), (15)
β , :
- 1,4;
h = 1,4(0,5*0,04 + 0,05*3*2,942/9,81)/(1 0,05*3)=1,4(0,02+0,13)/0,85=0,25;
h = 1,4(0,5*0,08+0,05*3*4,162/9,81)/(1-0,05*3)=1,4(0,04+0,26)/0,85=0,49
- 1;
h= 1*0,15/0,85 = 0,18;
h= 1*0,3/0,85 = 0,35
- 0,8
h= 0,8*0,15/0,85 = 0,14;
h= 0,8*0,3/0,85 = 0,28
(. .1) h , .
h = h(16)
h ≥ 1,8βΩ/(17)
β , . 2
:
- h ≥ h, h=2;
- h ≥ Δ;
- h ≥ 2,0
2 β.
.
, , , , . .
, .3.
3 .
Δ = 0,6Ic2/R, (18)
R = 5Ic .
,
Δ = 0,6*1382/5*138 = 11426,4/690 = 16,56;
Δ = 0,6*652/5*65 = 2535/325 = 7,8
R = R + 0/2 + Δ (19)
, :
R
R = 690 + 2,6*17/2 + 16,56 = 728,66;
R = 325 + 2,6*9,4 + 7,8 = 357,24
(..3) :
|
|
- 12 ,
- 23 , 20Δ.
12 1.
(: , )
, . :
() . .4;
4 .
() , 0,2 , . .5.
5 .
() , 0,2 . .6.
6 .
. , , , , . .7.
7 .
, , La,
L = L1 + L2 + L3, (20)
L1 , 5I;
L3 ,
ΣI ;
L2 , ,
L2 = [I2 + (4R C)C]0,5, (21)
I ;
R ( ), R=3I;
.
:
1.
C = 0,6bc + 0,5Δb, (22)
= 0,6bc + 0,5*0,35Ic/R = 0,6bc + 0,5*0,35Ic2/3Ic
C= 0,6*17 + 0,5*0,35*1382/3*138 = 10,2 + 8,05 = 18,25
L2= [1382 + (4*3*138 18,25)*18,25]0,5 = [19044+29888,93]0,5=221,2
L= L1+ L2+ L3=0,5*138+221,2+(138+65)=493,2
= 0,6*9,4 + 0,5*0,35*652/3*65 = 5,64 + 3,79 = 9,43
L2= [652 + (4*3*65 9,43)*9,43]0,5 = [4225 + 7266,47]0,5 = 107,2
L= L1+ L2+ L3= 0,5*65+107,2+(65+138)=342,7
|
|
2. :
,
0,75bc < am ≤ 1,3bc + 0,25Δb,
C = 1,9bc + 0,5Δb am (23)
,
1,3bc + 0,25Δb < am ≤ 1,3bc + 0,5Δb,
C = am 0,7bc (24)
3.
C = 1,2bc + 0,5Δb (25)
= 1,2*17 + 8,05 = 28,45
L2= [1382 + (4*3*138 28,45)*28,45]0,5 = (19044+46303,78)0,5 = 255,6
= 1,2*9,4 + 3,79 = 15,07
L2= [652 + (4*3*65 15,07)*15,07]0,5 = 125,5
(22)(25):
bc ;
Δb = 0,35Ic2/R ;
am /2 /2+0,2b. .
L2 L3
= b + Δb = 2,6bc + Δb, (26)
B = 3,9bc + Δb
L4 20 .
B 0, =0 . L4 .
, ..
= h, (27)
( ) .
La . 0,2I, .
Lm
Lm = L2 + ΣIc γIc, (28)
ΣI ;
γ , 0,2 0 .
:
( ), 250;
500.
, , :
,
0,5Ic;
0,33I.