.


:




:

































 

 

 

 


7




[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]

+

 





:


: 2016-10-07; !; : 343 |


:

:

, , .
==> ...

1097 - | 861 -


© 2015-2024 lektsii.org - -

: 0.095 .