b = R2 - (R h)2 = 1,152 (1,15 0,15)2 = 0,568 .
1,25, .
, .
, .
R = F + F = 22730 8000 = 14730 .
R = 1,25 (F + W) - F = 1,25 (6600 + 690) 5744 = 3969 .
, R. :
R 14730 14730
S = ____________ = ___________________________ = _________________________ = 4715 .
8m cosy 8 * 0,4 * cos12,5 8 * 0,4 * 0,9763
3 (. . 12) = 1650 /2.
S 4715
F = ________ = __________ = 2,36 2.
1650
1 ´ 3 . = 600 /2.
F = ________ = 7,86 2.
, 7,86 2, d = 3,16 .
.
150 ( ). . .
.
, .
Q 20000 2140 20
R = ______ + F + 2S * cosy = ____________ + (250 + 5 * 4 + ___________) * _________
4 4 20 4
+ 2 * 4715 * 0,9765 = 16093 .
b = 30 /2.
R 16093
F = ___________ = __________ = 536 2.
30
b = 200 :
F 536
t = ___________ = __________ = 26,8 .
b 20
, . 2.15. , 38,8 a.
360 * 38,8 360 * 26,8 a
a = ______________ = ____________________________ = 13,3; ______ = 6,7
2p * R 2 ´ 3,14 * 1,15 * 100 2
a a
BD = BH * cos _____ = R * cos _____ = 115 * 0,9932 = 114 .
2 2
D = B BD = 115 114 = 1 . , .
|
|
R
A a/2 a/2
D h
F
. 2.15.
20 , 20 , 2,67 , 2,4 .
. 6 , , 30,0 ( --).
62 -- ( 2.16.). : 9,72 , 21 , 13,4 , 2,87 , 1,301 . 100 /.
), ( ). .
.
= 0,025 * 4240 + 0 + 100 + 25 = 231 ..
= 240 . 240 .
20
F
2,67
a 4,24
. 2.16.
. .
20 * (1,301 + 0,24 + 1,335) + 21 * 0,8
= __________________________________________________ = 1,81< 2,3 .
20 + 21
= 20 * 2,67 * 0,5 + 11,9 = 38,6 2 < 50 2 j = 0,5.
, .
, .
, ,
(1200 970) * 20
F = [1200 - __________________________] * 20 = 22730 .
F = 330 * 20 = 6600 ,
F = (250 + ___________) * 20 = 7140 ,
W = 50 * 20 * 2,67 * 0,5 = 1335 ,
F = 1000 * 0,4 * 20 = 8000 ,
F = 0,4 * [1000 - (250 + __________)] * 20 = 5144
Q * b 20,000 * 1,2
h = _____ = ________________________ = ________________________________________ = 2,55 > 1,25
(F + W) * (h h) (6,600 + 1,335) * (1,335 0,15)
, . :
h = ________ = 6,0 > 1,25
1,335
, . 6 .
|
|
F F
R = ________________________________________ =
k (0,4 sina + osa * osb)
22730 - 8000
= _____________________________________________ = 2332 .
6 * (0,4 * sin30 + os30 * os10)
. 1.30 [4] 6 , 2480 .
., .
1,25 * (F + W) F 1,25 * (6600 + 1335) - 5144
k = _______________________________ = ____________________________________ = 33 .
147
17 . .
Q 2140 Q
R = ______ + (250 + 5 * 4 + ________) * ______ + k * sina * m * R =
2 20 2
= 10000 + (250 + 5 * 4 + _______) * 10 + 6 * 0,4 * 2480 * sin30 = 16746
a = 30 /2.
F = ___________ = 558 2
F = 240 * 24 = 5760 2;
F > F
, . .
______ > 1,41, -
9,72
:
L2 l2
f = _________ - _______ + - b
8R 8R
L - , ;
l - , ;
R - , ;
- , -
.
L2
= 70 * (_______ - 1,41) .
l2
b -
, -
,
200002 97202
f = ________________ - _______________ + 46 105 = 50,1
8 * 350000 8 * 350000
= 70 * (_________ - 1,41) = 46 .
= + f = 1200 + 50 = 1250 < 1625
, .