( ), ( ..). , i (i=1,2,3,,n), Xi Di (.3). . , , , i .
, (. .3):
; R1= (13)
. 3.
:
.1 = R1X1
.2 = R1X2 P1(X2-X1)
.3 = R1X3 P2(X3-X2)- 1(X3-X1)
.i = R1Xi Pi-1 (Xi-Xi-1)- i-2(Xi-Xi-2)- -Pi-n+1(Xi-Xi-n+1)
.n = R1Xn Pn-1 (Xn-Xn-1)- n-2(Xn-Xn-2)- -P1(Xn-X1) (14)
:
Ϭ.i = .i /0,1D (15)
, Ϭ.i Ϭ.max = max(Ϭ.i).
:
Ϭ..= R1∙ /0,2d 3; τ. = /0,2d 3
(7) (8).
(9)-(12).
(1) (2).
2. 4 (n=4). (. .3), : D0=450; D1=D2=D3=D4=400, x1=210, x2=460, x3=710, x4=960, l=250; A=1300; d=230. (. .2,) , : d2= 200, b=60, h=20. 1= 2=3=4=1100. =80∙. -65.
(13)
R2= (1100∙0,21+1100∙0,46+1100∙0,71+1100∙0,96)/1,3= 1980,
R1=1100+1100+1100+1100 -1980=2420 .
(14) :
.1 = 2420∙0,21= 508,2 ∙,
.2 = 2420∙046- 1100(0,46-0,21) =838,2 ∙
.3= 2420∙0,71- 1100(0,71-0,46)- 1100(0,71-0,21)=893,2 ∙
.4= 2420∙0,96- 1100(0,96-0,71)-1100(0,96-0,46)-1100(0,96-0,21) =673,2 ∙.
(3)
|
|
Ϭ.1 = =79,4,
Ϭ.2 = =130,96,
Ϭ.3 = =139,56,
Ϭ.4 = =105,18.
(5)(6)
Ϭ. = =248,6,
τ = =32,9.
, (8)
Ϭ =0,375∙248,6+0,625 =253,95.
, (10)
τ = =51,6.
(2), .1 ϭ=500 τ=0,7∙500=350.
:
n1=500/79,4=6,3
n2=500/130,96=3,8
n3=500/139,56=3,5
n4=500/105,18=4,75
n=min(n1,n2,n3,n4)=3,5;
n=500/253,95=1,97;
n=350/51,6=6,8.
, , [n]=5. .