1-
- 1
,
13
: ..
: -51
: ..
.
2010 .
:
% | Fr, H | F , H | |||||
Ø25H8 | e8,s6,js7 | Ø 48S7/f6 | 6-36204 | 300 | 0,6 | 4000 |
1.
.
: Ø25H8,e8,s6,js7
1. , , .
Ø25H8: ES=33 EI=0
Ø25e8: es=-40 ei=-73
Ø25s6: es=+48 ei=+35
Ø25js7: es=+10 ei=-10
Ø25H8/e8:
TD=Dmax - Dmin= ES(D) - EI(D)=33-0=33
Td=dmax - dmin= es(d) ei(d)=-40 +73=33
Smax=Dmax - dmin=ES ei=33+73=106
Smin=Dmin - dmax=EI es=0+40=40
T(S)=TD +Td= Smax - Smin=33+33=106-40=66
Ø25H8/s6:
TD=Dmax - Dmin= ES(D) - EI(D)=33-0=33
Td=dmax - dmin= es(d) ei(d)=48-35=13
Nmax= dmax - Dmin = es EI =48-0=48
Nmin= dmin - Dmax = ei ES=35-33=2
T(N)=TD +Td= Nmax - Nmin=33+13=48-2=46
Ø25H8/js7:
TD=Dmax - Dmin= ES(D) - EI(D)=33-0=33
Td=dmax - dmin= es(d) ei(d)=10+10=20
Smax=Dmax - dmin=ES ei=33+10=43
Nmax= dmax - Dmin = es EI =10-0=10
T(S,N)=TD +Td= Smax + Nmax=33+20=43+10=53
. | , | , | , , T(S) T(N) T(S,N) | |||||||||
, | ||||||||||||
ES | EI | TD | es | ei | Td | Smax | Smin | Nmax | Nmin | |||
Ø25H8/e8 | -40 | -73 | +33 | - | - | |||||||
Ø25H8/s6 | +48 | +35 | +13 | - | - | |||||||
Ø25H8/js7 | +10 | -10 | +20 | - | - |
2. :
Ø25H8/e8 Ø25H8/s6
Ø25H8/js7
3. Ø48
2. .
: Ø 48S7/f6
1. , :
Ø 48S7: ES=-34 EI=-59
Ø 48f6: es=-25 ei=-41
|
|
Dmax=47.966 dmax=47.975
Dmin=47.941 dmin=47.959
: H=4 Z=3,5 Y=3
: H1=4 Z1=3.5 Y1=3
2. :
3. , :
:
:
P-max= Dmin + Z + H/2 =47.941+0,0035+0,002=47,9465.
:
P-min =Dmin + Z - H/2 =47,941+0,0035-0,002=47,9425
:
P- =Dmin - Y = 47,941-0,003=47,938
:
P-max =Dmax + H/2 =47,966+0,002=47,968
:
P-min =Dmax - H/2 = 47,966-0,002=47,964.
:
:
P-max =dmax Z1 + H1/2 = 47.975-0,0035+0,002= 47.9735
:
P-min =dmax - Z1 - H1/2 = 47.975-0,0035-0,002=47.9695
:
P- =dmax + Y1 = 47.975+0,003= 47.978
:
P-max =dmin + H1/2 =47,959+0,002= 47,961
:
P-min =dmin - H/2 = 47,959-0,002=47,957
4. , :
:
0.04 |
0.04 |
0.04 |
0.08 |
0.08 |
-0,034 |
-0,059 |
Ø48S7 |
3.
: 6-36204, 300%, d1/d=0,6, Fr=4000H, F=500H.
1. -, , . 6, d1/d=0,6. . Fr =4000. 300%.
831-75, d=20 , D=47, B=14, r=1, =12o
:
EI(d) = -8 ES(d) = 0
es(D) = 0 ei(D) = -9
, , .
2. :
,
G, .. Ø47
3. :
b = B 2r = 14 21= 12
:k1 = 1,8, k2 = 1.6, k3 = 2
Pr = 1920[/]
4. :
, Pr = 1920 [/] d = 20 n6, .. Ø 20 L6/n6.
5. :
Ø 20n6()
Ø 47JS7()
|
|
+ |
- |
L6 |
-8 |
n6 |
+15 |
+28 |
+ |
- |
l6 |
-9 |
JS7 |
-12 |
+12 |
:
1. Ø 20 2. Ø 47
+ |
- |
n6 |
E8 |
+15 |
+28 |
+40 |
+73 |
+ |
- |
f6 |
+12 |
JS7 |
-12 |
-25 |
-41 |
6. :
0,012 = 0,012 |
Ø47JS7/l6 |
Ø20L6/n6 |
0.63 |
0.63 |
0,006 = 0,006 |