[1], c. 65, . 4.7 Kv=1,2
Kb=1+(Z2/q)3(1-x)
[1], c. 64, . 4.6 Z2=2, q=10 q=86; x=0,6.
Kb=1+(10/86)3. (0,4)=1,005
K= Kv Kb=1,005.1,2=1,206
8. .
[s]= 170/2 M2K({z2/q}+1)3 = 170/2 217,045.103.1,206.27/1503= 122,9
[s] <[s]=148
: {([s] - [s])/[s]}.100%={(148-122,9)/148}.100%=16,938%
II. .
1. .
Zv=Z2/cos3g=20/(cos(1119))3=21
[1], c. 63, . 4.5 YF=2,43
2.
sF=1,2M2K .YF/Z2b2m2= 1,2 . 217,0455. 1,206 . 2,43/20 . 11,25 . (10)2=4,218<
<[s-1F]=28
IV. .
: M2=217,0445 .
45
[t]=15¸20
1.
dB2 = 3 M2/0,2[t]; [t]= 18
dB2 = 3 217,0445.103/0,2.18 = 40 .
2. .
dB2= dB2 (1+(0,1¸0,15))=40(1+0,1)=44
: dB2=45
V.
1. .
45: 1,5
D=70 ; H=10 ; D1=56 ; b=6 ; c=1,0 ; h=3 ; ([1], c. 188, . 9.1)
([1], c. 189, . 9.2)
D=45,5 ; D1=56 ; h=5 ; r=0,5 ; D=72 ; b=5,8 ; l=42 ; S=1,6
2.
lc=(1,4¸1,5) dB lc=1,4 dB
dc=(1,6¸1,8) dB dc=1,6 dB
lc=55,25 ; dc=76,5
3.
([1], c. 169, . 8.9): b=14 ; h=9
l= lc-(5¸10) =65,25-10=55,25
( 23360-78, [1], . 169) l=56
l= l b=56-14=42
s=2/{dB(l b)(h-t1)}=2. 217,0455/45.10-3.42.10-3.3,5.10-3=65 >[s]=50¸60 2 .
t=P/Fcp=P/ l b=2M/dBl.b=2.217,0455.103/45.56.14=12,29
4. .
, , 12, dB =50 , 36210
=20 , D=90 , =2,7 , =43, 2
5. .
D=D...=90
VI.
: 1=25,785 .; 2=217,0455 .
Pt1=Pa2=2M1/d1=2.25,785.103/125=412,56 .
Pt2=Pa1=2M2/d2=2.217,0455.103/250= 1735, 552
Ph1= Ph2= Pt2 . tga=1735,552.tg20=631,689
1. Pa1 Pa2 :
|
|
M(Pa2)= Pa2.d2/2=412,56.200/2=41256 .
M(Pt1)= Pt2.d2/2=1735,552.200/2=173555 .
2.
YZ: Mxc= -M(Pa2)=-41256 .
Mxa= - M(Pa2)+ Ph2.a=-9279,12
Mxb=0
XZ:
yc=0; Myb=0
Mya= Pt2.a=138800 .
80 85 120
3. .
d = 45
4.
W=0,1 d3=9112,5 3
W=0,2 d3 =18225 3
5.
S= (Mxa)2+ (Mya)2 = (41256)2+(138800)2 = 144801,6 .
6.
smax= S / W= 15,89 ; tmax=M/ W =M(Pt2)/W =9,52
7.
) s
smin= smax= 15,89
s= smax= 15,89
sm= 0
s
s smax
t
smin
) t
t=t=tmax/2=4,76
t
tmax t
t
t
8.
45, s=610
s-1= 260 , t-1=130
9.
Ks/es= f(d)=3 ([1], c. 166, . 8.7)
Kt/et=0,6.Ks/es+0,4=2,2
10. .
Ss={s-1/ [(Ks/esb)ssa+Ys.sm]}=260/3.15,89=5,45
b=1; Ys=0,2; Yt=0,1
St={t-1/ [(Kt/etb).ta+Yt.tm]}=(130/[2,2 . 4,76+0,1 . 4,76])=11,87
SS= Ss .St / Ss2 + St2 =64,69/12,99=4,97>4; .
VII. .
+15
45 H7/K6.
6 7
1) +2
H7: +21
0
6: +15
+2
2)
: 45,021
45,0
: 45, 015
45,002 .
VIII.
1. 17.1 3 t=200 C [s]=134 /2
2.
S=(pD/[2j[s]-p])+c=[1,4.1000/(2.0,9.134-1,4)]+3=8,838
j- , j=0,9
- =3 - 12621-67 S=10 .
3.
S1=(pDy/4j[s])+c={1,4.1000.2/4.0,9.134}+3=8,51
4.
Sk=[pDp/{(2[s]j-p)cosa]+c
Dp=D-2[s(1-sa)+sina DS1/cosa ] =640,94
Sk=[1,4.640,94/(2.0,9.134-1,4).0,707]+3=7,12
S=10 S=7 S=10 . 12621-67.
|
|
, S=10
5.
Skp=pD/(2j[s]-p)+c=1,4.1000/(2.0,9.134-1,4)+3=8,83
6533-68
Skp=10
IX. P
1.
C=F/L
=2.105 /2
F=pD2cp/4; Dcp=-=20-1,5=18,5
F=3,14.(18,5)2/4=268,663
L=2b+h+4
9493-60 P=0,6
B=65, h=2
L=2.65+2+4=136
=2.105.268,67/136=3,95.105 /
2.
C=F/h
=3.103 / ( )
F=p(D42-D52)/4z=3,14([1065]2-[1029]2)/4.44=1344.92 2
h=2
=3.103.1344,9/2=2,02.106 /
3. , 1
Q=ppDcp2/4z=1,4.3,14.(1067)2/4.44=28436 =28,44
4.
=C/(+)= 3,95.105 /(3,95.105+2,02.106)=0,164
5.
V=K(1-K)Q
=1,3¸1,5 ( )
V=1,5(1-0,164).28436=30900 =30
6. .
DL=V/C=30900/3,95.105=0,072
DL=V/=30900/2,02.106=0,0153
7. ( )
V=; V>0,
( ):
V=V-(1-K)Q=
=V+KQ=
35 20 =21 20 20 200
= <[], .
X. .
1.
s=P/F=ppD2/4SpD= pD/4S£[s]
[s]=134 /2
s=1,4.1000/4.10=35 /2
2.
h=Kcos45=0,7K
K=S
h=0,7.10=7
, , :
[t]=0,65[s]=0,65.134=87,1 /2
:
t=P/F=ppD2/4.0,7KpD= pD/4.0,7K=50 /2
2 :
t= pD/2.4.0,7K=25 /2
t=25<87,1=[t]
+