1. .
Ft2=3356 H; Fa2=444 H; Fr2=1090 H; Ft=7841 ; Fr=2585 H; Fa=1340 H;
2. .
3. a1=75 , a2=130 , 3=85 .
4. .
1)
Ry3*290+Fa2*d2/2+Fr2*215-Ft3*85=0
Ry3=(7841*85-1090*215-444*160)/290=1245 H
-Ry4*290+Fa2*d2/2-Fr2*75+Ft3*205=0
Ry4=(7841*205-1090*75+444*160)/290=5506 H
: 5506+1245+1090-7841=0
2)
R3*290+Fa3*d3/2+Fr3*85-Ft2*215=0
R3=(3356*215-1340*68,5-2585*85)/290=1414
R4*290-Fa3*d3/2+Fr3*205-Ft2*75=0
Rx4=(1340*68,5+3356*75-2585*205)/290= - 643 H
:1414+2585-643-3356=0.
, . 1) :
1: z1=0; z1B=75 ; My(0)=0; My(75)=Ry3*75=93375 ;
: z2=0; z2C=130 ; My(0)= Ry3*75+Fa2*d2/2=164415 H;
My(130)= Ry3*205+Fa2*d2/2+Fr2*130=467965 H;
3: z3=0; z3C=85 ; My(0)=0; My(85)=Ry4*85=468010 H
1) :
1: z1=0; z1B=75 ; Mx(0)=0; Mx(75)=Rx3*75=106050 ;
: z2=0; z2C=130 ; Mx(0)= Rx3*75=106050 H;
Mx(130)= Rx3*205-Ft2*130=-146410 H;
3: z3=0; z3C=85 ; Mx(0)=0; Mx(85)=Rx4*85-Fa3*d3/2=-146445 H
5.2
1. .
Ft=7841 H; Fr=2585 H; Fa=1340 H;
2. .
a1=210 ; a2=90 .
3. .
1)
Ry5*300+Ft4*90=0
Ry5=-7841*90/300=-2352 H
Ry6*300+Ft4*210=0
Ry6=-7841*210/300=-5489 H
: -2352-5489+7841=0.
2)
Rx5*300-Fr4*90+Fa4*d4/2=0
Rx5=(2585*90-1340*246,5)/300=-325,5 H
Rx6*300-Fr4*210-Fa4*d4/2=0
Rx6=(2585*210+1340*246,5)/300=2910,5 H
: -325,5-2885+2910,5=0
4. , .
1) :
5: z1=0; z1E=210 ; M(0)=0; M(210)=R5*210=-68355 H;
6: z2=0; z2E=90 ; M(0)=0; (90)=R6*90=261945 H;
2) :
5: z1=0; z1E=210 ; My(0)=0; My(210)=Ry5*210=-493920 H;
6: z2=0; z2E=90 ; My(0)=0; y(90)=Ry6*90=494010 H;
5.3 .
.
-:
=38850 ; =162575 ; =19700
= =167196 .
σ= /0,1d3=167196/0,1*613=7,4< 50
:
=146455 ; =468010 ; =536930
= =656251 .
σ= /0,1d3=656251/0,1*603=31< 50
:
=261945 ; =493920 ; =1839670
= =1682501 .
σ= /0,1d3=1682501/0,1*853=27,4< 50
|
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,
6.1 :
:
d=28 ; d=45 ; df1=60,8 ; da1=96 ; d1=80 ; b1=132 ;
l1=350 ; f1=65.
6.1 .
: , , :
dk=60; δ1= δ2=16 ;
dct=100 ; =18 ; l=80 ; d=10; L=25 ;
d2=320; da2=336; df2=300,8 mm; daM2=352 mm.
6.2 .
45 .
6.3
:
dk=60 mm; d3=136,96mm; da3=145,96 mm; df2=125,71mm; d=96 mm; lc=b3=105 mm;
45 .
6.4
dk=85 mm; d4=493,04 mm; da4=502,04 mm; df4=481,8 mm; b4=100 ; d=136 mm; l=110 mm; δ4=12 ; C=30 mm; D=296 ; d=80 mm;