如何限制 整体模型的 刚体位移

zp4655958

对下面的桁架 为了确定其刚度 对其施加了1kn/m的分布力 可是怎么限制其刚体位移了？要怎么约束？
!单位 KN M S
finish  
/clear  
/prep7  
!define elem
et,1,189
!mat1-concret35?
mp,ex,1,3.15e7
mp,prxy,1,0.2   
!define beamsec
sectype,1,beam,rectng   
secdata,1.6,0.8 ! wl  
sectype,2,beam,rectng   
secdata,1,0.8 ! zhl  
sectype,3,beam,rectng   
secdata,0.8,0.8 ! zcl1
sectype,4,beam,rectng   
secdata,0.7,0.8 ! zcl2  
sectype,5,beam,rectng   
secdata,0.6,0.6 !   ljl
!define solide-spring   
et,2,10
mp,ex,2,1e6
keyopt,2,3,1
r,6,1
!input kp
k , 1 , -56.2 , -42.525 , 0
k , 2 , -56.2 , -30.425 , 0
k , 3 , -56.2 , -21.425 , 0
k , 4 , -56.2 , -12.425 , 0
k , 5 , -56.2 , -4 , 0
k , 6 , -56.2 , 4 , 0
k , 7 , -56.2 , 12.425 , 0
k , 8 , -56.2 , 21.425 , 0
k , 9 , -56.2 , 30.425 , 0
k , 10 , -56.2 , 42.525 , 0
k , 11 , -46.11797534 , 42.525 , 0
k , 12 , -38.61894873 , 42.525 , 0
k , 13 , -31.11992213 , 42.525 , 0
k , 14 , -24.1 , 42.525 , 0
k , 15 , -17.4 , 42.525 , 0
k , 16 , -10.7 , 42.525 , 0
k , 17 , -4 , 42.525 , 0
k , 18 , 4 , 42.525 , 0
k , 19 , 10.7 , 42.525 , 0
k , 20 , 17.4 , 42.525 , 0
k , 21 , 24.1 , 42.525 , 0
k , 22 , 31.11992213 , 42.525 , 0
k , 23 , 38.61894873 , 42.525 , 0
k , 24 , 46.11797534 , 42.525 , 0
k , 25 , 56.2 , 42.525 , 0
k , 26 , 56.2 , 30.425 , 0
k , 27 , 56.2 , 21.425 , 0
k , 28 , 56.2 , 12.425 , 0
k , 29 , 56.2 , 4 , 0
k , 30 , 56.2 , -4 , 0
k , 31 , 56.2 , -12.425 , 0
k , 32 , 56.2 , -21.425 , 0
k , 33 , 56.2 , -30.425 , 0
k , 34 , 56.2 , -42.525 , 0
k , 35 , 46.11797534 , -42.525 , 0
k , 36 , 38.61894873 , -42.525 , 0
k , 37 , 31.11992213 , -42.525 , 0
k , 38 , 24.1 , -42.525 , 0
k , 39 , 17.4 , -42.525 , 0
k , 40 , 10.7 , -42.525 , 0
k , 41 , 4 , -42.525 , 0
k , 42 , -4 , -42.525 , 0
k , 43 , -10.7 , -42.525 , 0
k , 44 , -17.4 , -42.525 , 0
k , 45 , -24.1 , -42.525 , 0
k , 46 , -31.11992213 , -42.525 , 0
k , 47 , -38.61894873 , -42.525 , 0
k , 48 , -46.11797534 , -42.525 , 0
k , 49 , -4 , -35.825 , 0
k , 50 , -4 , -29.125 , 0
k , 51 , -4 , -20.625 , 0
k , 52 , -4 , -12.075 , 0
k , 53 , -4 , -3.575 , 0
k , 54 , -4 , 4.425 , 0
k , 55 , -4 , 12.925 , 0
k , 56 , -4 , 20.125 , 0
k , 57 , -4 , 29.125 , 0
k , 58 , -4 , 35.825 , 0
k , 59 , 4 , -35.825 , 0
k , 60 , 4 , -29.125 , 0
k , 61 , 4 , -20.625 , 0
k , 62 , 4 , -12.075 , 0
k , 63 , 4 , -3.575 , 0
k , 64 , 4 , 4.425 , 0
k , 65 , 4 , 12.925 , 0
k , 66 , 4 , 20.125 , 0
k , 67 , 4 , 29.125 , 0
k , 68 , 4 , 35.825 , 0
k , 69 , -30.50135361 , 34.84237857 , 0
k , 70 , -36.88114038 , 35.61064072 , 0
k , 71 , -36.90270722 , 27.15975715 , 0
k , 72 , -43.65996106 , 27.475 , 0
k , 73 , -43.39729278 , 19.36524285 , 0
k , 74 , -50.43878175 , 19.33935928 , 0
k , 75 , -49.79864639 , 11.68262143 , 0
k , 76 , -44.38016698 , 35.61064072 , 0
k , 77 , -51.15898767 , 36.475 , 0
k , 78 , -50.43878175 , 28.33935928 , 0
k , 79 , 44.70023466 , 35.22650965 , 0
k , 80 , 51.15898767 , 36.475 , 0
k , 81 , 50.11871407 , 28.72349035 , 0
k , 82 , 30.50135361 , 34.84237857 , 0
k , 83 , 37.52127574 , 34.84237857 , 0
k , 84 , 36.90270722 , 27.15975715 , 0
k , 85 , 43.91601521 , 27.16769514 , 0
k , 86 , 43.39729278 , 19.36524285 , 0
k , 87 , 50.11871407 , 19.72349035 , 0
k , 88 , 49.79864639 , 11.68262143 , 0
k , 89 , -49.79864639 , -11.68262143 , 0
k , 90 , -50.11871407 , -19.72349035 , 0
k , 91 , -43.39729278 , -19.36524285 , 0
k , 92 , -43.65996106 , -27.475 , 0
k , 93 , -36.90270722 , -27.15975715 , 0
k , 94 , -37.20120806 , -35.22650965 , 0
k , 95 , -30.50135361 , -34.84237857 , 0
k , 96 , -50.11871407 , -28.72349035 , 0
k , 97 , -51.15898767 , -36.475 , 0
k , 98 , -44.70023466 , -35.22650965 , 0
k , 99 , 30.50135361 , -34.84237857 , 0
k , 100 , 37.20120806 , -35.22650965 , 0
k , 101 , 36.90270722 , -27.15975715 , 0
k , 102 , 43.65996106 , -27.475 , 0
k , 103 , 43.39729278 , -19.36524285 , 0
k , 104 , 50.11871407 , -19.72349035 , 0
k , 105 , 49.79864639 , -11.68262143 , 0
k , 106 , 44.38016698 , -35.61064072 , 0
k , 107 , 51.15898767 , -36.475 , 0
k , 108 , 50.43878175 , -28.33935928 , 0
!create waistbeam
*do,i,1,47
l,i,i+1
*enddo
l,48,1
cm,wlline,line
latt,1,1,1
lesize,all,,,5
lmesh,all
esel,all
cm,wl,elem
lsel,none
!create crossbeam
lsel,none
*do,i,49,57
l,i,i+1
*enddo
*do,i,59,67
l,i+1,i
*enddo
l,42,49
l,58,17
l,18,68
l,59,41
latt,1,2,1
lesize,all,,,5
lmesh,all
esel,all
esel,u,,,wl
cm,zhl,elem
lsel,none
!create obliquebeam-1
*do,i,69,73,2
l,i+2,i
*enddo
l,14,69
l,75,6
l,57,15
l,20,67
*do,i,82,86,2
l,i,i+2
*enddo
l,21,82
l,88,29
*do,i,99,103,2
l,i+2,i
*enddo
l,30,105
l,99,38
l,44,50
l,60,39
*do,i,89,93,2
l,i+2,i
*enddo
l,45,95
l,89,5
latt,1,3,1
lesize,all,,,5
lmesh,all
esel,all
cmsel,u,wl
cmsel,u,zhl
cm,zcl1,elem
lsel,none
!create obliquebeam-2
l,7,74
l,74,72
l,72,70
l,70,13
l,8,78
l,78,76
l,76,12
l,9,77
l,77,11
l,22,83
l,83,85
l,85,87
l,87,28
l,23,79
l,79,81
l,81,27
l,24,80
l,80,26
l,31,104
l,104,102
l,102,100
l,100,37
l,32,108
l,108,106
l,106,36
l,33,107
l,107,35
l,46,94
l,94,92
l,92,90
l,90,4
l,47,98
l,98,96
l,96,3
l,48,97
l,97,2
l,58,16
l,19,68
l,43,49
l,59,40
latt,1,4,1
lesize,all,,,5
lmesh,all
esel,all
cmsel,u,wl
cmsel,u,zhl
cmsel,u,zcl1
cm,zcl2,elem
lsel,none
!create combinebeam
*do,i,69,74
l,i,i+1
*enddo
l,13,69
l,75,7
l,11,76
l,76,77
l,77,78
l,78,9
*do,i,82,87
l,i,i+1
*enddo
l,22,82
l,88,28
l,24,79
l,79,80
l,80,81
l,81,26
*do,i,99,104
l,i,i+1
*enddo
l,37,99
l,105,31
l,35,106
l,106,107
l,107,108
l,108,33
*do,i,89,94
l,i,i+1
*enddo
l,4,89
l,95,46
l,2,96
l,96,97
l,97,98
l,98,48
*do,i,49,58
l,i,i+10
*enddo
l,18,58
l,58,67
l,57,66
l,66,55
l,55,64
l,64,53
l,53,62
l,62,51
l,51,60
l,60,49
l,49,41
latt,1,5,1
lesize,all,,,5
lmesh,all
esel,all
cmsel,u,wl
cmsel,u,zhl
cmsel,u,zcl1
cmsel,u,zcl2
cm,ljl,elem
allsel,all
!creat solid-spring
cmsel,s,wl  
nsle,s,1
cm,wlnode,node  
nsel,s,loc,x,-56.2
ngen,2,2000,all,,,-1
cmsel,s,wlnode  
nsel,s,loc,x,56.2  
ngen,2,2000,all,,,1
cmsel,s,wlnode  
nsel,s,loc,y,-42.525
ngen,2,2000,all,,,,-1   
cmsel,s,wlnode  
nsel,s,loc,y,42.525  
ngen,2,2000,all,,,,1
n,2500,-57.200,-42.525,0
n,2600,-57.200,42.525,0
n,2700,57.2,-42.524,0
n,2800,57.2,42.525,0
type,2
mat,2
real,6
*do,i,1,480
e,i+2000,i
*enddo  
e,2500, 1,
e,2600,82
e,2800,232
e,2700,322
allsel  
nsel,s,loc,x,-57.2
nsel,a,loc,x,57.2
nsel,a,loc,y,43.525
nsel,a,loc,y,-43.525
cm,springnode,node
!define load
allsel
cmsel,s,wl
sfbeam,all,2,pres,1
allsel
cmsel,s,springnode
d,all,all
allsel
cmsel,s,wlline
nsll,s,1
d,all,uz
allsel,al

sjzrifdsa

同问。我也遇到了这样的问题。