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.