: 1 = 70,9 B 1284-89
: 50150;
D1min = 125
h = 10,5 ;
q = 0,18 1 ;
.
D1 = 160 .
(5.1):
D2 = D1·Up·(1-e), e = 0,015;
D2 = 160·2.02·0,985 = 318,3 ().
D2 = 319 .
(5.2-5.3):
min = 0,55(D1+ D2) + h = 0,55(160+319)+10,5 = 273,95 ();
max = D1+ D2 = 479 ().
= 450 .
(5.4):
L = 2 + (D1+ D2)∙1,57+ (D2 - D1)2/4 = 2·450 + 479∙1,57+ (319-160)2/4·450 = 1666 ().
L = 1600 .
:
w = (D1+ D2)∙1,57= 752 ();
y = (D2 - D1)2 = 25281 (2);
= = = 420().
:
a1 = 180 - 57·(D2 - D1)/ = 180-57·159/420 = 158˚. 120.
:
V = p D1n1/60·1000 = p·160·970/60·1000 = 8.1 /.
(5.10):
= .= 2,5
, . :
= + = 352 (),
F = 2 F0·z·sina/2 = 2·352·3·sin(158/2) = 937 ().
.
= (Z-1)p + 2f = (3-1)∙19+2∙12,5 = 63 ().
- | ||
, | D1 | |
, | D2 | |
U1-2 | 2,02 | |
, | a | |
, | L | |
Z | ||
, , | Fp |
.
40. s = 900 /2. . d (7.1):
= 30 ().
d = 30 . - 28: 36206 (B=16 ).
l1, :
l1 = = 16().
:
l2 = 1,3d = 1,3∙30 = 39 ().
:
d= d - 2t = 30 2×2,2 = 35,6(). t = 2,2 d = 30 .
d = 36 .
: l = 1,5 d = 1,5∙36 = 54 ().
:
d = d + 3,2r = 30 + 3,2×2 = 36,4(). t = 2,8 d = 45.
d = 55 .
l = b2 + 15 = 51+15 = 66 ().
(7.7):
d = d + 3f = 55 + 3×2 = 61 (). f = 2 d = 55 .
d = 60. . l = 15 (.7.7).
|
|
. 7.7
.
. 7.8.
YZ.
S MCY = 0; Fr2l2 + RDY (l2+l3) = 0;
RDY = (H).
RCY = Fr2 RDY = 1674+158= 1832 ().
.
S MDY = 0; + Fr2l3 RCY (l2+l3) = +1674∙50 - 1832∙100 = 0.
XZ.
S MCX = 0; Fl1 + Ft2l2 RDX (l2+l3) = 0;
RDX = (H).
RCX = Ft2 RDX F = 44602858 800 = 802 ().
.
S MDX = 0; F (l1+ l2+l3) + RCX (l2+l3) Ft2l3 = 800∙178,5+802∙100 - 4460∙50 = 0.
.
YZ.
y = RCYl2 = 1832∙50 = 91600 (H).
2 = RDYl3= 158∙50 = 7900 (H).
XZ.
= F l1 = 800×78,5 = 62800 (H).
2 = RDXl3 = 2858∙50 = 142900 (H).
RC= (); RD= = 2862 ().
(.7.8) , - ( d = 55). max:
max = =174128 ().
S [S].
:
S ³ [S]. [S] = 2.
,
Ss, St - .
. 7.8.
,
,
Ss = , St = ;
s-1, t-1 ;
s-1 = 0,35s + (70120) /2, t-1 0,58s-1;
s-1 = 0,35×900 + 100 = 415 (/2), t-1 = 241 (/2);
ks, kt - ; ks = 1,9, kt = 1,9 s = 900 /2;
es, et - . 55, , es = 0,81, et = 0,69;
ys, yt - , ; ys = 0,1; yt = 0,05 ( 29);
s, t ;
s = = 10,6 (/2); t = (/2);
sm, tm ;
sm =0, tm = t = 7 (/2).
:
Ss = ;
St = ;
S = .
S > [S] .