.


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.




Ft1 = 2890 ; Fr1 = 976 H; Fa1 = 390 H

,

F = 8010,5 = 80138,70,5 = 942

 

.6.1

 

xz:

åmA =108Fk +172Ft 100Bx = 0,

BX = (108942 + 172∙2890)/100 = 5988 H,

AX = BX + Fk Ft = 5988 + 942 2890 = 4040 H,

:

åmB = 0,072Ft+ 0,2083Fk 0,100A = 0,072∙2890+0,208∙942 0,100∙4040 ≈ 0,

MX1 = Ft×0,072 = 2890×0,072 =208,1 H×.

MX2 = 942×0,108 =101,7 H×.

yz:

åmA = 172Fr Fa×d1/2 100By = 0,

By = (172976 390×96,0/2)/100 =1492 ,

Ay = By Fr =1492 976 = 516 H,

:

åmB = 0,072Fr 0,100Ay Fa×d1/2 =

= 0,072∙976 0,100∙516 3900,0960/2 ≈ 0,

My1 = 5160,100 = 51,6 ×,

My2 = 5160,172 0,0721492 = -18,7 ×,

:

= (40402 + 5162)1/2 =4073 ,

= (59882 +14922)1/2 = 6171 .

 

 

6.2. .

P = (XVFr + YFa)K

;

Y ;

V = 1 ;

Fr ;

Y ;

Fa ;

K = 1,7 ;

= 1 .

 

:

SA = 0,83eA = 0,83×0,33×4073 =1116 H,

SB = 0,83eB = 0,83×0,33×6171 =1690 H.

.

S1< S2; Fa < S2 S1

. 9.21

FaA = SB + Fa = 1690 + 390 =2080 H,

FaB = SB = 1690 H.

.

Fa/Fr =2080/4073= 0,51> e, =0,4; Y=1.80

= (1,0×0,4×4073 + 1.82080)1,7×1,0 = 9134 .

.

Fa/Fr =1690/6171= 0,27< e, =1,0; Y= 0.

= (1,0×1,0×6171+ 0)1,7×1,0 =10491 .

B

 

6.3. .

= 106(134,0×103 /10491)10/3/60×2946 = 27558 ,

, 25200 .

7211, = 65

= 106(65,0×103 /10491)10/3/60×2946 = 2471 ,

, 25200 . 7311.


6.4.

Ft1 = 2890 ; Fr1 = 390 H; Fa1 = 976 H

,

F = 12520,5 =125334,80,5 =2287

 

 

.6.2

 

 

.

åm = 50Ft + 196DX 320F2k = 0

D XOZ

DX = (3202287 502890)/196 = 2997 H

C XOZ

CX = Ft + DX F2k = 2890 + 2997 2287 = 3600 H

åmD = 0,196CX 0,146Ft 0,124F2k =

= 0,1963600 0,1462890 0,1242287 ≈ 0

XOZ

MX1 =36000,050 =180,0 ͷ

MX2 =22870,124 =283,6 ͷ

 

.

C

åmC = 50Fr2+196Dy Fad2/2 = 0

D YOZ

DY = (Fad2/2 50Fr2)/196 =

(976240,0/2 390∙50)/196 = 498 H

CY = Fr2 + Dy =390+498 = 888 H

åmD = 0,196CY 0,146Fr Fad2/2 =

= 0,196888 0,1463909760,2400/2 ≈ 0

YOZ

MY1 = 8880,050 = 44,4 ͷ

MY2 = 4980,146 = 72,7 ͷ

C = (36002 + 8882)0,5 =3708 H

D = (29972 + 4982)0,5 =3038 H

6.5.

:

SC = 0,83eC = 0,83×0,41×3708 = 1262 H,

SD = 0,83eD = 0,83×0,413038 =1034 H.

.

S1 > S2; Fa > 0

. 9.21

FaC = SD Fa = 1034 976 = 58 H,

FaD = SD = 1034 H.

C.

Fa/Fr = 58/3708= 0,02< e, =1,0; Y=0.

= (1,0×1,0×3708+0)1,7×1,0 = 6304 .

D.

Fa/Fr =1034/3038= 0,34< e, =1,0 Y=0

= (1,0×1,0×3038+ 0)1,7×1,0 = 5165 .

C.





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