ansys 非线性屈曲分析，为什么得到的是直线呢？
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这是命令流
/CLEAR, NOSTART
/FILNAME, SPACEMAST1
/PREP7
/TITLE, ANALYSIS OF THE RETRACABLE SPACE MAST
!*****************************************
! 模型
!*************************
NUMSTR,KP,1
NUMSTR,LINE,1
NUMSTR,AREA,1
NUMSTR,VOLU,1
CSYS,0
k, 1 ,-200.000,.000,.000,
k, 2 ,98.722,173.937,.000,
l, 1 ,2
k, 3 ,102.110,-171.970,.000,
l, 1 ,3
l, 3 ,2
k, 4 ,-200.000,.000,200.000,
k, 5 ,98.722,173.937,200.000,
l, 4 ,5
k, 6 ,102.110,-171.970,200.000,
l, 4 ,6
l, 6 ,5
k, 7 ,-200.000,.000,400.000,
k, 8 ,98.722,173.937,400.000,
l, 7 ,8
k, 9 ,102.110,-171.970,400.000,
l, 7 ,9
l, 9 ,8
k, 10 ,-200.000,.000,600.000,
k, 11 ,98.722,173.937,600.000,
l, 10 ,11
k, 12 ,102.110,-171.970,600.000,
l, 10 ,12
l, 12 ,11
k, 13 ,-200.000,.000,800.000,
k, 14 ,98.722,173.937,800.000,
l, 13 ,14
k, 15 ,102.110,-171.970,800.000,
l, 13 ,15
l, 15 ,14
k, 16 ,-200.000,.000,1000.000,
k, 17 ,98.722,173.937,1000.000,
l, 16 ,17
k, 18 ,102.110,-171.970,1000.000,
l, 16 ,18
l, 18 ,17
k, 19 ,-200.000,.000,1200.000,
k, 20 ,98.722,173.937,1200.000,
l, 19 ,20
k, 21 ,102.110,-171.970,1200.000,
l, 19 ,21
l, 21 ,20
k, 22 ,-200.000,.000,1400.000,
k, 23 ,98.722,173.937,1400.000,
l, 22 ,23
k, 24 ,102.110,-171.970,1400.000,
l, 22 ,24
l, 24 ,23
k, 25 ,-200.000,.000,1600.000,
k, 26 ,98.722,173.937,1600.000,
l, 25 ,26
k, 27 ,102.110,-171.970,1600.000,
l, 25 ,27
l, 27 ,26
k, 28 ,-200.000,.000,1800.000,
k, 29 ,98.722,173.937,1800.000,
l, 28 ,29
k, 30 ,102.110,-171.970,1800.000,
l, 28 ,30
l, 30 ,29
k, 31 ,-200.000,.000,2000.000,
k, 32 ,98.722,173.937,2000.000,
l, 31 ,32
k, 33 ,102.110,-171.970,2000.000,
l, 31 ,33
l, 33 ,32
k, 34 ,-200.000,.000,2200.000,
k, 35 ,98.722,173.937,2200.000,
l, 34 ,35
k, 36 ,102.110,-171.970,2200.000,
l, 34 ,36
l, 36 ,35
k, 37 ,-200.000,.000,2400.000,
k, 38 ,98.722,173.937,2400.000,
l, 37 ,38
k, 39 ,102.110,-171.970,2400.000,
l, 37 ,39
l, 39 ,38
k, 40 ,-200.000,.000,2600.000,
k, 41 ,98.722,173.937,2600.000,
l, 40 ,41
k, 42 ,102.110,-171.970,2600.000,
l, 40 ,42
l, 42 ,41
k, 43 ,-200.000,.000,2800.000,
k, 44 ,98.722,173.937,2800.000,
l, 43 ,44
k, 45 ,102.110,-171.970,2800.000,
l, 43 ,45
l, 45 ,44
k, 46 ,-200.000,.000,3000.000,
k, 47 ,98.722,173.937,3000.000,
l, 46 ,47
k, 48 ,102.110,-171.970,3000.000,
l, 46 ,48
l, 48 ,47
k, 49 ,-200.000,.000,3200.000,
k, 50 ,98.722,173.937,3200.000,
l, 49 ,50
k, 51 ,102.110,-171.970,3200.000,
l, 49 ,51
l, 51 ,50
k, 52 ,-200.000,.000,3400.000,
k, 53 ,98.722,173.937,3400.000,
l, 52 ,53
k, 54 ,102.110,-171.970,3400.000,
l, 52 ,54
l, 54 ,53
k, 55 ,-200.000,.000,3600.000,
k, 56 ,98.722,173.937,3600.000,
l, 55 ,56
k, 57 ,102.110,-171.970,3600.000,
l, 55 ,57
l, 57 ,56
k, 58 ,-200.000,.000,3800.000,
k, 59 ,98.722,173.937,3800.000,
l, 58 ,59
k, 60 ,102.110,-171.970,3800.000,
l, 58 ,60
l, 60 ,59
k, 61 ,-200.000,.000,4000.000,
k, 62 ,98.722,173.937,4000.000,
l, 61 ,62
k, 63 ,102.110,-171.970,4000.000,
l, 61 ,63
l, 63 ,62
k, 64 ,-200.000,.000,4200.000,
k, 65 ,98.722,173.937,4200.000,
l, 64 ,65
k, 66 ,102.110,-171.970,4200.000,
l, 64 ,66
l, 66 ,65
k, 67 ,-200.000,.000,4400.000,
k, 68 ,98.722,173.937,4400.000,
l, 67 ,68
k, 69 ,102.110,-171.970,4400.000,
l, 67 ,69
l, 69 ,68
k, 70 ,-200.000,.000,4600.000,
k, 71 ,98.722,173.937,4600.000,
l, 70 ,71
k, 72 ,102.110,-171.970,4600.000,
l, 70 ,72
l, 72 ,71
k, 73 ,-200.000,.000,4800.000,
k, 74 ,98.722,173.937,4800.000,
l, 73 ,74
k, 75 ,102.110,-171.970,4800.000,
l, 73 ,75
l, 75 ,74
k, 76 ,-200.000,.000,5000.000,
k, 77 ,98.722,173.937,5000.000,
l, 76 ,77
k, 78 ,102.110,-171.970,5000.000,
l, 76 ,78
l, 78 ,77
k, 79 ,-200.000,.000,5200.000,
k, 80 ,98.722,173.937,5200.000,
l, 79 ,80
k, 81 ,102.110,-171.970,5200.000,
l, 79 ,81
l, 81 ,80
k, 82 ,-200.000,.000,5400.000,
k, 83 ,98.722,173.937,5400.000,
l, 82 ,83
k, 84 ,102.110,-171.970,5400.000,
l, 82 ,84
l, 84 ,83
k, 85 ,-200.000,.000,5600.000,
k, 86 ,98.722,173.937,5600.000,
l, 85 ,86
k, 87 ,102.110,-171.970,5600.000,
l, 85 ,87
l, 87 ,86
k, 88 ,-200.000,.000,5800.000,
k, 89 ,98.722,173.937,5800.000,
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k, 90 ,102.110,-171.970,5800.000,
l, 88 ,90
l, 90 ,89
k, 91 ,-200.000,.000,6000.000,
k, 92 ,98.722,173.937,6000.000,
l, 91 ,92
k, 93 ,102.110,-171.970,6000.000,
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l, 93 ,92
k, 94 ,-200.000,.000,6200.000,
k, 95 ,98.722,173.937,6200.000,
l, 94 ,95
k, 96 ,102.110,-171.970,6200.000,
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k, 98 ,98.722,173.937,6400.000,
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k, 99 ,102.110,-171.970,6400.000,
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l, 99 ,98
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k, 101 ,98.722,173.937,6600.000,
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k, 102 ,102.110,-171.970,6600.000,
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l, 102 ,101
k, 103 ,-200.000,.000,6800.000,
k, 104 ,98.722,173.937,6800.000,
l, 103 ,104
k, 105 ,102.110,-171.970,6800.000,
l, 103 ,105
l, 105 ,104
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k, 107 ,98.722,173.937,7000.000,
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k, 108 ,102.110,-171.970,7000.000,
l, 106 ,108
l, 108 ,107
k, 109 ,-200.000,.000,7200.000,
k, 110 ,98.722,173.937,7200.000,
l, 109 ,110
k, 111 ,102.110,-171.970,7200.000,
l, 109 ,111
l, 111 ,110
k, 112 ,-200.000,.000,7400.000,
k, 113 ,98.722,173.937,7400.000,
l, 112 ,113
k, 114 ,102.110,-171.970,7400.000,
l, 112 ,114
l, 114 ,113
k, 115 ,-200.000,.000,7600.000,
k, 116 ,98.722,173.937,7600.000,
l, 115 ,116
k, 117 ,102.110,-171.970,7600.000,
l, 115 ,117
l, 117 ,116
k, 118 ,-200.000,.000,7800.000,
k, 119 ,98.722,173.937,7800.000,
l, 118 ,119
k, 120 ,102.110,-171.970,7800.000,
l, 118 ,120
l, 120 ,119
k, 121 ,-200.000,.000,8000.000,
k, 122 ,98.722,173.937,8000.000,
l, 121 ,122
k, 123 ,102.110,-171.970,8000.000,
l, 121 ,123
l, 123 ,122
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l, 4 ,3
l, 4 ,2
l, 6 ,2
l, 3 ,5
l, 1 ,5
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l, 49 ,53
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l, 55 ,53
l, 54 ,56
l, 53 ,57
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l, 58 ,57
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l, 55 ,59
l, 58 ,62
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l, 85 ,90
l, 88 ,87
l, 88 ,86
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l, 112 ,110
l, 114 ,110
l, 111 ,113
l, 109 ,113
l, 112 ,116
l, 112 ,117
l, 115 ,114
l, 115 ,113
l, 114 ,116
l, 113 ,117
l, 115 ,120
l, 118 ,117
l, 118 ,116
l, 120 ,116
l, 117 ,119
l, 115 ,119
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l, 118 ,123
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l, 121 ,119
l, 120 ,122
l, 119 ,123
l, 1 ,4
l, 4 ,7
l, 7 ,10
l, 10 ,13
l, 13 ,16
l, 16 ,19
l, 19 ,22
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l, 28 ,31
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l, 37 ,40
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l, 43 ,46
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l, 52 ,55
l, 55 ,58
l, 58 ,61
l, 61 ,64
l, 64 ,67
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l, 27 ,30
l, 30 ,33
l, 33 ,36
l, 36 ,39
l, 39 ,42
l, 42 ,45
l, 45 ,48
l, 48 ,51
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l, 66 ,69
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l, 72 ,75
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!下面进行单元的定义
ET, 1, BEAM188 !纵杆和三叉架径向杆单元
ET, 2, LINK10 !索单元
ET,3,MASS21 !质量单元
KEYOPT,2,2,0
KEYOPT,2,3,0 !索只受拉，不受压
R,3,0.1963,0.152e-3, !索的相关参数r，initial strain
R,4,1.0,1.0,1.0, , , ,!质量单元参数
R,5,1.05e-3,1.05e-3,1.05e-3, , , ,!质量单元参数
!下面定义截面
SECTYPE, 1, BEAM, CSOLID, Long-Spar, 0!定义实心圆面long-spar
SECOFFSET, CENT
SECDATA,2.5,0,0,0,0,0,0,0,0,0 !半径2.5mm
SECTYPE, 2, BEAM, CSOLID, Shor-Spar, 0
SECOFFSET, CENT
SECDATA,1.875,0,0,0,0,0,0,0,0,0 !半径1.875mm
SECPLOT, 1,0 !截面绘图
SECPLOT, 2,0
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!模量及泊松比beam-188-纵杆
MP, EX, 1, 131e6!131GPA=131e6kPa
MP, PRXY, 1, 0.27
MP, DENS,1,1.6e-6!kg/mm3
MP,DAMP,1,0.05!材料阻尼
!模量及泊松比beam-188-横杆
MP, EX, 2, 70e6
MP, PRXY, 2, 0.27
MP, DENS,2,2.7e-6
MP,DAMP,2,0.05!材料阻尼
!模量及泊松比link-10
MP, EX, 3, 131e6
MP, PRXY, 3, 0.27
MP, DENS,3,1.6e-6
MP,DAMP,3,0.05!材料阻尼
!****************
! 定义节点和单元
!****************
lplot
!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!
lplot
!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!1
!mesh long-spar
TYPE, 1
MAT, 1
ESYS, 0
SECNUM, 1
!下面选择纵杆线
lsel,s,line,,364,403,1!
lsel,a,line,,404,443,1!
lsel,a,line,,444,483,1!
lplot
LESIZE,all, , ,3, , , , ,1 !划分成3个单元
LMESH,all!划分线，生成单元
ALLSEL,ALL
lsel,s,line,,1,123,1!!!!选择所有三角横杆
lplot
TYPE, 1
MAT, 2
!REAL, 1
ESYS, 0
SECNUM, 2
LESIZE,all, , ,5, , , , ,1 !划分成5个单元
LMESH,all!划分线，生成单元
!下面对拉索进行单元划分
!!!!!!!!!!!!!1
!!!!!!!!!!!!!!!!1
allsel,all
lsel,s,line,,124,363,1
lplot
TYPE, 2
MAT, 3
REAL, 3
ESYS, 0
LESIZE,all, , ,1, , , , ,1 !划分成1个单元
LMESH,all!划分线，生成单元
!creat mass nodes & elements
TYPE, 3
!MAT, 1!不必定义mat,质量单元么
REAL, 4 !不应该出现real,但gui操作时却出现了应该不影响
ESYS, 0
E,119
E,240
E,361!
NPLOT
TYPE, 3
REAL, 5
ESYS, 0
*DO,J,1,243,121
e,J
*ENDDO
*DO,J,2,119,3
E,J
E,J+121
E,J+242
*enddo !定义质量单元完毕
allsel,all
!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!施加约束
nsel,s,node,,1,243,121
nplot
d,all,all,0
allsel,all
csys,0
allsel,all
!nsel,s,node,,119,361,121
nplot
fk,121,fz,-1000!施加1N !只加一个节点上
allsel,all
/solu
antype,0!静力分析
eqslv,spar!选择稀疏矩阵直接求解器
pstres,on!预应力选项打开
solve
finish
/solu
antype,1!特征值屈曲分析
bucopt,lanb,6,0,0!模态提取方法及提取数量
mxpand,6,0,0,1,0.001!扩展10阶
solve
finish
/post1
*get,freq1,mode,1,freq !获取第一模态的频率值，赋予freq1
finish !
!非线性屈曲分析
/config,nres,200 !只记录两百步的结果 !
/prep7 !
UPGEOM,0.03,1,1,'SPACEMAST1','rst',' ' !引入结构缺陷，把第一荷载步第一荷载子步的结果spacemast，缩放0.01倍后引入
finish !
/solu !
antype,0 !
nlgeom,1 !打开大变形
outres,all,all !
arclen,1,0 !弧长法设置
arctrm,l !弧长法终止准则达到第一个峰值是终止计算
nsubst,200,,,1
fk,121,fz,-12000*freq1!!只加一个关键点上
solve
!
finish !
!
/post26 !
nsol,2,119,u,y,deflection !提取自由端z方向的位移为变量deflection NSOL, NVAR, NODE, Item, Comp, Name!2为变量名，,119为端部节点
rforce,3,1,f,z,reactionf !提取固定端z方向的支座反力为变量reactionf,节点号1，变量名3
/axlab,x,deflection !定义x坐标
/axlab,y,reactionf !定义y坐标
xvar,2 !
plvar,3 !
得到位移荷载曲线是线性的，怎么不是曲线呢？请大侠们指点！
/CLEAR, NOSTART
/FILNAME, SPACEMAST1
/PREP7
/TITLE, ANALYSIS OF THE RETRACABLE SPACE MAST
!*****************************************
! 模型
!*************************
NUMSTR,KP,1
NUMSTR,LINE,1
NUMSTR,AREA,1
NUMSTR,VOLU,1
CSYS,0
k, 1 ,-200.000,.000,.000,
k, 2 ,98.722,173.937,.000,
l, 1 ,2
k, 3 ,102.110,-171.970,.000,
l, 1 ,3
l, 3 ,2
k, 4 ,-200.000,.000,200.000,
k, 5 ,98.722,173.937,200.000,
l, 4 ,5
k, 6 ,102.110,-171.970,200.000,
l, 4 ,6
l, 6 ,5
k, 7 ,-200.000,.000,400.000,
k, 8 ,98.722,173.937,400.000,
l, 7 ,8
k, 9 ,102.110,-171.970,400.000,
l, 7 ,9
l, 9 ,8
k, 10 ,-200.000,.000,600.000,
k, 11 ,98.722,173.937,600.000,
l, 10 ,11
k, 12 ,102.110,-171.970,600.000,
l, 10 ,12
l, 12 ,11
k, 13 ,-200.000,.000,800.000,
k, 14 ,98.722,173.937,800.000,
l, 13 ,14
k, 15 ,102.110,-171.970,800.000,
l, 13 ,15
l, 15 ,14
k, 16 ,-200.000,.000,1000.000,
k, 17 ,98.722,173.937,1000.000,
l, 16 ,17
k, 18 ,102.110,-171.970,1000.000,
l, 16 ,18
l, 18 ,17
k, 19 ,-200.000,.000,1200.000,
k, 20 ,98.722,173.937,1200.000,
l, 19 ,20
k, 21 ,102.110,-171.970,1200.000,
l, 19 ,21
l, 21 ,20
k, 22 ,-200.000,.000,1400.000,
k, 23 ,98.722,173.937,1400.000,
l, 22 ,23
k, 24 ,102.110,-171.970,1400.000,
l, 22 ,24
l, 24 ,23
k, 25 ,-200.000,.000,1600.000,
k, 26 ,98.722,173.937,1600.000,
l, 25 ,26
k, 27 ,102.110,-171.970,1600.000,
l, 25 ,27
l, 27 ,26
k, 28 ,-200.000,.000,1800.000,
k, 29 ,98.722,173.937,1800.000,
l, 28 ,29
k, 30 ,102.110,-171.970,1800.000,
l, 28 ,30
l, 30 ,29
k, 31 ,-200.000,.000,2000.000,
k, 32 ,98.722,173.937,2000.000,
l, 31 ,32
k, 33 ,102.110,-171.970,2000.000,
l, 31 ,33
l, 33 ,32
k, 34 ,-200.000,.000,2200.000,
k, 35 ,98.722,173.937,2200.000,
l, 34 ,35
k, 36 ,102.110,-171.970,2200.000,
l, 34 ,36
l, 36 ,35
k, 37 ,-200.000,.000,2400.000,
k, 38 ,98.722,173.937,2400.000,
l, 37 ,38
k, 39 ,102.110,-171.970,2400.000,
l, 37 ,39
l, 39 ,38
k, 40 ,-200.000,.000,2600.000,
k, 41 ,98.722,173.937,2600.000,
l, 40 ,41
k, 42 ,102.110,-171.970,2600.000,
l, 40 ,42
l, 42 ,41
k, 43 ,-200.000,.000,2800.000,
k, 44 ,98.722,173.937,2800.000,
l, 43 ,44
k, 45 ,102.110,-171.970,2800.000,
l, 43 ,45
l, 45 ,44
k, 46 ,-200.000,.000,3000.000,
k, 47 ,98.722,173.937,3000.000,
l, 46 ,47
k, 48 ,102.110,-171.970,3000.000,
l, 46 ,48
l, 48 ,47
k, 49 ,-200.000,.000,3200.000,
k, 50 ,98.722,173.937,3200.000,
l, 49 ,50
k, 51 ,102.110,-171.970,3200.000,
l, 49 ,51
l, 51 ,50
k, 52 ,-200.000,.000,3400.000,
k, 53 ,98.722,173.937,3400.000,
l, 52 ,53
k, 54 ,102.110,-171.970,3400.000,
l, 52 ,54
l, 54 ,53
k, 55 ,-200.000,.000,3600.000,
k, 56 ,98.722,173.937,3600.000,
l, 55 ,56
k, 57 ,102.110,-171.970,3600.000,
l, 55 ,57
l, 57 ,56
k, 58 ,-200.000,.000,3800.000,
k, 59 ,98.722,173.937,3800.000,
l, 58 ,59
k, 60 ,102.110,-171.970,3800.000,
l, 58 ,60
l, 60 ,59
k, 61 ,-200.000,.000,4000.000,
k, 62 ,98.722,173.937,4000.000,
l, 61 ,62
k, 63 ,102.110,-171.970,4000.000,
l, 61 ,63
l, 63 ,62
k, 64 ,-200.000,.000,4200.000,
k, 65 ,98.722,173.937,4200.000,
l, 64 ,65
k, 66 ,102.110,-171.970,4200.000,
l, 64 ,66
l, 66 ,65
k, 67 ,-200.000,.000,4400.000,
k, 68 ,98.722,173.937,4400.000,
l, 67 ,68
k, 69 ,102.110,-171.970,4400.000,
l, 67 ,69
l, 69 ,68
k, 70 ,-200.000,.000,4600.000,
k, 71 ,98.722,173.937,4600.000,
l, 70 ,71
k, 72 ,102.110,-171.970,4600.000,
l, 70 ,72
l, 72 ,71
k, 73 ,-200.000,.000,4800.000,
k, 74 ,98.722,173.937,4800.000,
l, 73 ,74
k, 75 ,102.110,-171.970,4800.000,
l, 73 ,75
l, 75 ,74
k, 76 ,-200.000,.000,5000.000,
k, 77 ,98.722,173.937,5000.000,
l, 76 ,77
k, 78 ,102.110,-171.970,5000.000,
l, 76 ,78
l, 78 ,77
k, 79 ,-200.000,.000,5200.000,
k, 80 ,98.722,173.937,5200.000,
l, 79 ,80
k, 81 ,102.110,-171.970,5200.000,
l, 79 ,81
l, 81 ,80
k, 82 ,-200.000,.000,5400.000,
k, 83 ,98.722,173.937,5400.000,
l, 82 ,83
k, 84 ,102.110,-171.970,5400.000,
l, 82 ,84
l, 84 ,83
k, 85 ,-200.000,.000,5600.000,
k, 86 ,98.722,173.937,5600.000,
l, 85 ,86
k, 87 ,102.110,-171.970,5600.000,
l, 85 ,87
l, 87 ,86
k, 88 ,-200.000,.000,5800.000,
k, 89 ,98.722,173.937,5800.000,
l, 88 ,89
k, 90 ,102.110,-171.970,5800.000,
l, 88 ,90
l, 90 ,89
k, 91 ,-200.000,.000,6000.000,
k, 92 ,98.722,173.937,6000.000,
l, 91 ,92
k, 93 ,102.110,-171.970,6000.000,
l, 91 ,93
l, 93 ,92
k, 94 ,-200.000,.000,6200.000,
k, 95 ,98.722,173.937,6200.000,
l, 94 ,95
k, 96 ,102.110,-171.970,6200.000,
l, 94 ,96
l, 96 ,95
k, 97 ,-200.000,.000,6400.000,
k, 98 ,98.722,173.937,6400.000,
l, 97 ,98
k, 99 ,102.110,-171.970,6400.000,
l, 97 ,99
l, 99 ,98
k, 100 ,-200.000,.000,6600.000,
k, 101 ,98.722,173.937,6600.000,
l, 100 ,101
k, 102 ,102.110,-171.970,6600.000,
l, 100 ,102
l, 102 ,101
k, 103 ,-200.000,.000,6800.000,
k, 104 ,98.722,173.937,6800.000,
l, 103 ,104
k, 105 ,102.110,-171.970,6800.000,
l, 103 ,105
l, 105 ,104
k, 106 ,-200.000,.000,7000.000,
k, 107 ,98.722,173.937,7000.000,
l, 106 ,107
k, 108 ,102.110,-171.970,7000.000,
l, 106 ,108
l, 108 ,107
k, 109 ,-200.000,.000,7200.000,
k, 110 ,98.722,173.937,7200.000,
l, 109 ,110
k, 111 ,102.110,-171.970,7200.000,
l, 109 ,111
l, 111 ,110
k, 112 ,-200.000,.000,7400.000,
k, 113 ,98.722,173.937,7400.000,
l, 112 ,113
k, 114 ,102.110,-171.970,7400.000,
l, 112 ,114
l, 114 ,113
k, 115 ,-200.000,.000,7600.000,
k, 116 ,98.722,173.937,7600.000,
l, 115 ,116
k, 117 ,102.110,-171.970,7600.000,
l, 115 ,117
l, 117 ,116
k, 118 ,-200.000,.000,7800.000,
k, 119 ,98.722,173.937,7800.000,
l, 118 ,119
k, 120 ,102.110,-171.970,7800.000,
l, 118 ,120
l, 120 ,119
k, 121 ,-200.000,.000,8000.000,
k, 122 ,98.722,173.937,8000.000,
l, 121 ,122
k, 123 ,102.110,-171.970,8000.000,
l, 121 ,123
l, 123 ,122
l, 1 ,6
l, 4 ,3
l, 4 ,2
l, 6 ,2
l, 3 ,5
l, 1 ,5
l, 4 ,8
l, 4 ,9
l, 7 ,6
l, 7 ,5
l, 6 ,8
l, 5 ,9
l, 7 ,12
l, 10 ,9
l, 10 ,8
l, 12 ,8
l, 9 ,11
l, 7 ,11
l, 10 ,14
l, 10 ,15
l, 13 ,12
l, 13 ,11
l, 12 ,14
l, 11 ,15
l, 13 ,18
l, 16 ,15
l, 16 ,14
l, 18 ,14
l, 15 ,17
l, 13 ,17
l, 16 ,20
l, 16 ,21
l, 19 ,18
l, 19 ,17
l, 18 ,20
l, 17 ,21
l, 19 ,24
l, 22 ,21
l, 22 ,20
l, 24 ,20
l, 21 ,23
l, 19 ,23
l, 22 ,26
l, 22 ,27
l, 25 ,24
l, 25 ,23
l, 24 ,26
l, 23 ,27
l, 25 ,30
l, 28 ,27
l, 28 ,26
l, 30 ,26
l, 27 ,29
l, 25 ,29
l, 28 ,32
l, 28 ,33
l, 31 ,30
l, 31 ,29
l, 30 ,32
l, 29 ,33
l, 31 ,36
l, 34 ,33
l, 34 ,32
l, 36 ,32
l, 33 ,35
l, 31 ,35
l, 34 ,38
l, 34 ,39
l, 37 ,36
l, 37 ,35
l, 36 ,38
l, 35 ,39
l, 37 ,42
l, 40 ,39
l, 40 ,38
l, 42 ,38
l, 39 ,41
l, 37 ,41
l, 40 ,44
l, 40 ,45
l, 43 ,42
l, 43 ,41
l, 42 ,44
l, 41 ,45
l, 43 ,48
l, 46 ,45
l, 46 ,44
l, 48 ,44
l, 45 ,47
l, 43 ,47
l, 46 ,50
l, 46 ,51
l, 49 ,48
l, 49 ,47
l, 48 ,50
l, 47 ,51
l, 49 ,54
l, 52 ,51
l, 52 ,50
l, 54 ,50
l, 51 ,53
l, 49 ,53
l, 52 ,56
l, 52 ,57
l, 55 ,54
l, 55 ,53
l, 54 ,56
l, 53 ,57
l, 55 ,60
l, 58 ,57
l, 58 ,56
l, 60 ,56
l, 57 ,59
l, 55 ,59
l, 58 ,62
l, 58 ,63
l, 61 ,60
l, 61 ,59
l, 60 ,62
l, 59 ,63
l, 61 ,66
l, 64 ,63
l, 64 ,62
l, 66 ,62
l, 63 ,65
l, 61 ,65
l, 64 ,68
l, 64 ,69
l, 67 ,66
l, 67 ,65
l, 66 ,68
l, 65 ,69
l, 67 ,72
l, 70 ,69
l, 70 ,68
l, 72 ,68
l, 69 ,71
l, 67 ,71
l, 70 ,74
l, 70 ,75
l, 73 ,72
l, 73 ,71
l, 72 ,74
l, 71 ,75
l, 73 ,78
l, 76 ,75
l, 76 ,74
l, 78 ,74
l, 75 ,77
l, 73 ,77
l, 76 ,80
l, 76 ,81
l, 79 ,78
l, 79 ,77
l, 78 ,80
l, 77 ,81
l, 79 ,84
l, 82 ,81
l, 82 ,80
l, 84 ,80
l, 81 ,83
l, 79 ,83
l, 82 ,86
l, 82 ,87
l, 85 ,84
l, 85 ,83
l, 84 ,86
l, 83 ,87
l, 85 ,90
l, 88 ,87
l, 88 ,86
l, 90 ,86
l, 87 ,89
l, 85 ,89
l, 88 ,92
l, 88 ,93
l, 91 ,90
l, 91 ,89
l, 90 ,92
l, 89 ,93
l, 91 ,96
l, 94 ,93
l, 94 ,92
l, 96 ,92
l, 93 ,95
l, 91 ,95
l, 94 ,98
l, 94 ,99
l, 97 ,96
l, 97 ,95
l, 96 ,98
l, 95 ,99
l, 97 ,102
l, 100 ,99
l, 100 ,98
l, 102 ,98
l, 99 ,101
l, 97 ,101
l, 100 ,104
l, 100 ,105
l, 103 ,102
l, 103 ,101
l, 102 ,104
l, 101 ,105
l, 103 ,108
l, 106 ,105
l, 106 ,104
l, 108 ,104
l, 105 ,107
l, 103 ,107
l, 106 ,110
l, 106 ,111
l, 109 ,108
l, 109 ,107
l, 108 ,110
l, 107 ,111
l, 109 ,114
l, 112 ,111
l, 112 ,110
l, 114 ,110
l, 111 ,113
l, 109 ,113
l, 112 ,116
l, 112 ,117
l, 115 ,114
l, 115 ,113
l, 114 ,116
l, 113 ,117
l, 115 ,120
l, 118 ,117
l, 118 ,116
l, 120 ,116
l, 117 ,119
l, 115 ,119
l, 118 ,122
l, 118 ,123
l, 121 ,120
l, 121 ,119
l, 120 ,122
l, 119 ,123
l, 1 ,4
l, 4 ,7
l, 7 ,10
l, 10 ,13
l, 13 ,16
l, 16 ,19
l, 19 ,22
l, 22 ,25
l, 25 ,28
l, 28 ,31
l, 31 ,34
l, 34 ,37
l, 37 ,40
l, 40 ,43
l, 43 ,46
l, 46 ,49
l, 49 ,52
l, 52 ,55
l, 55 ,58
l, 58 ,61
l, 61 ,64
l, 64 ,67
l, 67 ,70
l, 70 ,73
l, 73 ,76
l, 76 ,79
l, 79 ,82
l, 82 ,85
l, 85 ,88
l, 88 ,91
l, 91 ,94
l, 94 ,97
l, 97 ,100
l, 100 ,103
l, 103 ,106
l, 106 ,109
l, 109 ,112
l, 112 ,115
l, 115 ,118
l, 118 ,121
l, 2 ,5
l, 5 ,8
l, 8 ,11
l, 11 ,14
l, 14 ,17
l, 17 ,20
l, 20 ,23
l, 23 ,26
l, 26 ,29
l, 29 ,32
l, 32 ,35
l, 35 ,38
l, 38 ,41
l, 41 ,44
l, 44 ,47
l, 47 ,50
l, 50 ,53
l, 53 ,56
l, 56 ,59
l, 59 ,62
l, 62 ,65
l, 65 ,68
l, 68 ,71
l, 71 ,74
l, 74 ,77
l, 77 ,80
l, 80 ,83
l, 83 ,86
l, 86 ,89
l, 89 ,92
l, 92 ,95
l, 95 ,98
l, 98 ,101
l, 101 ,104
l, 104 ,107
l, 107 ,110
l, 110 ,113
l, 113 ,116
l, 116 ,119
l, 119 ,122
l, 3 ,6
l, 6 ,9
l, 9 ,12
l, 12 ,15
l, 15 ,18
l, 18 ,21
l, 21 ,24
l, 24 ,27
l, 27 ,30
l, 30 ,33
l, 33 ,36
l, 36 ,39
l, 39 ,42
l, 42 ,45
l, 45 ,48
l, 48 ,51
l, 51 ,54
l, 54 ,57
l, 57 ,60
l, 60 ,63
l, 63 ,66
l, 66 ,69
l, 69 ,72
l, 72 ,75
l, 75 ,78
l, 78 ,81
l, 81 ,84
l, 84 ,87
l, 87 ,90
l, 90 ,93
l, 93 ,96
l, 96 ,99
l, 99 ,102
l, 102 ,105
l, 105 ,108
l, 108 ,111
l, 111 ,114
l, 114 ,117
l, 117 ,120
l, 120 ,123
!下面进行单元的定义
ET, 1, BEAM188 !纵杆和三叉架径向杆单元
ET, 2, LINK10 !索单元
ET,3,MASS21 !质量单元
KEYOPT,2,2,0
KEYOPT,2,3,0 !索只受拉，不受压
R,3,0.1963,0.152e-3, !索的相关参数r，initial strain
R,4,1.0,1.0,1.0, , , ,!质量单元参数
R,5,1.05e-3,1.05e-3,1.05e-3, , , ,!质量单元参数
!下面定义截面
SECTYPE, 1, BEAM, CSOLID, Long-Spar, 0!定义实心圆面long-spar
SECOFFSET, CENT
SECDATA,2.5,0,0,0,0,0,0,0,0,0 !半径2.5mm
SECTYPE, 2, BEAM, CSOLID, Shor-Spar, 0
SECOFFSET, CENT
SECDATA,1.875,0,0,0,0,0,0,0,0,0 !半径1.875mm
SECPLOT, 1,0 !截面绘图
SECPLOT, 2,0
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!模量及泊松比beam-188-纵杆
MP, EX, 1, 131e6!131GPA=131e6kPa
MP, PRXY, 1, 0.27
MP, DENS,1,1.6e-6!kg/mm3
MP,DAMP,1,0.05!材料阻尼
!模量及泊松比beam-188-横杆
MP, EX, 2, 70e6
MP, PRXY, 2, 0.27
MP, DENS,2,2.7e-6
MP,DAMP,2,0.05!材料阻尼
!模量及泊松比link-10
MP, EX, 3, 131e6
MP, PRXY, 3, 0.27
MP, DENS,3,1.6e-6
MP,DAMP,3,0.05!材料阻尼
!****************
! 定义节点和单元
!****************
lplot
!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!
lplot
!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!1
!mesh long-spar
TYPE, 1
MAT, 1
ESYS, 0
SECNUM, 1
!下面选择纵杆线
lsel,s,line,,364,403,1!
lsel,a,line,,404,443,1!
lsel,a,line,,444,483,1!
lplot
LESIZE,all, , ,3, , , , ,1 !划分成3个单元
LMESH,all!划分线，生成单元
ALLSEL,ALL
lsel,s,line,,1,123,1!!!!选择所有三角横杆
lplot
TYPE, 1
MAT, 2
!REAL, 1
ESYS, 0
SECNUM, 2
LESIZE,all, , ,5, , , , ,1 !划分成5个单元
LMESH,all!划分线，生成单元
!下面对拉索进行单元划分
!!!!!!!!!!!!!1
!!!!!!!!!!!!!!!!1
allsel,all
lsel,s,line,,124,363,1
lplot
TYPE, 2
MAT, 3
REAL, 3
ESYS, 0
LESIZE,all, , ,1, , , , ,1 !划分成1个单元
LMESH,all!划分线，生成单元
!creat mass nodes & elements
TYPE, 3
!MAT, 1!不必定义mat,质量单元么
REAL, 4 !不应该出现real,但gui操作时却出现了应该不影响
ESYS, 0
E,119
E,240
E,361!
NPLOT
TYPE, 3
REAL, 5
ESYS, 0
*DO,J,1,243,121
e,J
*ENDDO
*DO,J,2,119,3
E,J
E,J+121
E,J+242
*enddo !定义质量单元完毕
allsel,all
!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!施加约束
nsel,s,node,,1,243,121
nplot
d,all,all,0
allsel,all
csys,0
allsel,all
!nsel,s,node,,119,361,121
nplot
fk,121,fz,-1000!施加1N !只加一个节点上
allsel,all
/solu
antype,0!静力分析
eqslv,spar!选择稀疏矩阵直接求解器
pstres,on!预应力选项打开
solve
finish
/solu
antype,1!特征值屈曲分析
bucopt,lanb,6,0,0!模态提取方法及提取数量
mxpand,6,0,0,1,0.001!扩展10阶
solve
finish
/post1
*get,freq1,mode,1,freq !获取第一模态的频率值，赋予freq1
finish !
!非线性屈曲分析
/config,nres,200 !只记录两百步的结果 !
/prep7 !
UPGEOM,0.03,1,1,'SPACEMAST1','rst',' ' !引入结构缺陷，把第一荷载步第一荷载子步的结果spacemast，缩放0.01倍后引入
finish !
/solu !
antype,0 !
nlgeom,1 !打开大变形
outres,all,all !
arclen,1,0 !弧长法设置
arctrm,l !弧长法终止准则达到第一个峰值是终止计算
nsubst,200,,,1
fk,121,fz,-12000*freq1!!只加一个关键点上
solve
!
finish !
!
/post26 !
nsol,2,119,u,y,deflection !提取自由端z方向的位移为变量deflection NSOL, NVAR, NODE, Item, Comp, Name!2为变量名，,119为端部节点
rforce,3,1,f,z,reactionf !提取固定端z方向的支座反力为变量reactionf,节点号1，变量名3
/axlab,x,deflection !定义x坐标
/axlab,y,reactionf !定义y坐标
xvar,2 !
plvar,3 !
得到位移荷载曲线是线性的，怎么不是曲线呢？请大侠们指点！
