1.1 [1,.5]:
h=h1h2h33, (1)
h1=0,98 ;
h2=0,95 ;
h3=0,99 .
h=0,98×0,95×0,993=0,9.
:
(2)
=3,2 .
19523-81 43 n1=1000 -1, =4
:
; (3)
:
u=n/n; (4)
u=950 / 20 = 47,5.
[1, .36]:
U1=5; U2=4,
:
u3 =u / (u2∙u3);
u1= 47,5 / (5∙4) = 2,375.
:
:
n=950 -1;
:
n1=n=950 -1;
:
n2=n1/u1;
n2=950 / 5 = 190 -1;
- :
n3=n2/u2;
n3=190 / 4 = 47,5 -1;
- :
n=n3/u3;
n=47,5 / 2,375 = 20 -1.
:
w=100 c-1;
:
w1=w=100 c-1;
:
w2=w1/u1= 100/ 5 = 20 -1;
:
w3=w2/u2;
w2=20 / 4 = 5 -1;
:
w=w2/u3;
w= 5/ 2,375 = 2,1 -1.
:
:
(5)
:
1= h1h4=40×∙0,98∙0,99=38,8 ;
:
2= u1h2h4=38,8×5×0,98×0,99=188 ;
:
3=2u2h2h4;
2=188×4×0,98×0,99 =730,6 ×;
:
= 3u3h3h4;
=730,6×2,375×0,95×0,99=1632 ×.
1
, n, -1 | , w, -1 | , , × | |
I | 38,8 | ||
III | |||
II | 47,5 | 730,6 | |
2,1 |
: 45, , 230, 45, , 200.
[1, .34, .3.2]:
sHlimb1=2HB1+70=2×230+70=530 ;
sHlimb2=2HB2+70=2×200+70=470 .
:
KHL=1 [1, .33],
[SH]=1,1 [1, .33].
:
[sH]=0,45([sH1]+[sH2])=0,45(482+428)=410 . (9)
[sH]<1,23[sH]2=526 .
: [1, .32]
|
|
KHB=1,25; Ka=43; yba=0,4.
:
; (10)
2=793 ;
2185-66 [1, .36]:
aw=224 .
:
mn=(0,01-0,02)aw; (11)
mn =(0,01-0,02)×224=2,24¸4,48 .
9563-60 [1, .36]:
mn=2,5 .
[1, .36]:
b=100.
:
(12)
z1=29,
z2=z1 u1;
z2=29×5=145.
:
;
.
, b=13,80.
:
(13)
;
:
:
da1=d1+2mn;
da1=74,67+2×2,5=79,67 ;
da2=d2+2mn;
da2=373,33+2×2,5=378,33 .
:
b2=ybaaw; (14)
yba=0,4 ;
b2=0,4×224=90 .
:
b1=b2+5;
b1=90+5=95 .
:
ybd= ; (15)
.
:
(16)
1643-81 8- .
: [1, .39-40]:
KHb=1,04; KHV=1; Ka=1,08.
:
KH=KHbKHVKHa;
=1,04×1×1,08=1,1232.
:
; (17)
sH<[sH] : 335 < 410 , , , .
, :
Ft= (18)
Ft
(19)
Fr
Fa=Fttgb; (20)
Fa=4393×0,2456 =1079 H.
:
sFlimb1=1,8HB1;
sFlimb1=1,8×230=414 ;
sFlimb2=1,8HB2;
sFlimb2=1,8×200=360 .
:
[SF]=[SF]' [SF]'';
[SF]'=1,75; [SF]''=1 [1, c.44];
[SF]=1,75×1=1,75.
:
; (21)
; (22)
:
(23)
(24)
, [1, .42]:
YF1=3,8; YF2=3,6.
:
, .
, [1, c.43]:
KFb=1,10.
, [1, c.43]:
KFV=1,3.
:
KF=KFbKFV;
F=1,1×1,3=1,43.
:
Yb=1b/1400;
Yb=113,80/1400=0,9;
KFa=0,92.
:
; (25)
sF<[sF]2 , 83<206 .
3
.
3=730,6 103 .
u=2,375.
:
:
z3=31 2u=312×2,375 = 26,25; (26)
:
z4=z3×u=26,25×2,375 = 62,3.
z3=27; z4=63.
:
:
[1, .152]:
=, (27)
=1 ;
|
|
=1 ;
=1 ;
=1,25 ;
=1 ;
=1 , .
=1×1×1×1,25×1×1=1,25.
n3 /.: n3=47,5 /.
n=50 /.
[p]=36 .
t, :
(28)
.7.15 [1, .147] -31,75-88,5 13568-75, t=31,75 , Q=88,5 , q=3,8 /, =262 2.
[1, .153]:
(29)
:
(30)
[1, .150]:
(31)
:
[p]=36×[1+0,01(z317)]=36×[1+0,01(2717)]=39,6 . (32)
36 n=50 / t=25,4 .
p<[p] .
[1, .148]:
Lt=2at+0,5zS+D2/at, (33)
at=a/t=50;
zS=z3+z4=27+63=100;
D=(z4z3)/2p=(6327) / (2×3,14)=5,73.
,
Lt=2×50+0,5×100+5,732/50=150,7.
Lt=150.
:
(34)
0,4%, 5 .
:
d3= (35)
(36)
:
(37)
d1=15,88 [1, .147].
, :
Ft=5383 ;
Fv=qV2,
q=2,6 /.
Fv=2,6×0,542=0,76 H;
:
Ff=9,81Kfqa=9,81×1×2,6×1,262 = 32,2 ,
f=1.
:
FB=Ft+2Ff=5383 + 2×32,2 = 5447 H. (38)
:
(39)
[s]=7,3,
s>[s] .