:
1) = 0: R12X + X2 + PC + X3 = 0
2) = 0: R12Y + Y2 + RO3 G2 G3 =0
3) = 0:
(xB xA)× R12Y yA× R12X + (xB xC)×(Y2 G2) yC×X2 + = 0
R12X = X2 PC X3 = 19,92 12700 123,75 = 12843,67 = 12,844
R12Y = (yA× R12X (xB xC)×(Y2 G2)+ yC×X2 )/ (xB xA)=
= [0,105×( 12843,67) (0,4070,142)×(157,2235,44)+0,0683×(19,92)
RO3 = G2 + G3 Y2 R12Y = 24×9,81 +55×9,81157,2 ( 3410,8)= 4028,59= 4,029
:
1) = 0: R1X R12X = 0
2) = 0: R12Y + R1Y G1 = 0
3) = 0: xA× R12Y + yA× R12X + = 0
R1X = R12X = 12843,67 = 12,844
R1Y = G1 + R12Y = 11×9,81 + ( 3410,8) = 3302,89 = 3,303
= xA× R12Y yA× R12X =0×( 3410,8) 0,105×(12843,67) =1348,6
R23 -?
1) = 0: R23X + PC + X3 = 0
2) = 0: R23Y + RO3 G3 = 0
R23X = PC + X3 = 15700 123,75 = 15576,52 = 15,58
R23Y = G3 RO3 = 55×9,81 4028,59= 3489,04 = 3,49
R23 = = = 15,97
2.3 .
> 0, Q >0,
1) = 0: R12X + R1X +QX = 0
2) = 0: R12Y + R1Y G1 QY =0
3) = 0: R12X× yA R12Y × xA − Q×r2×cosα = 0
r2 = m1×z2/2 = 11×28/2 = 154 α = 20
Q = ( R12X× yA + R12Y × xA)/(− r2×cosα) =
= ( 12843,67 ×0,105 3410,8×0)/(−0,154×0,9397) = 9300,62 = 9,3
2.4 . .
:
KF = RO3/ = 4,03/40 =0,10075 /
, 1 .
, , .
, = X3/ KF =0,124 /0,1 = 1,24