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海洋石油平台结构动力分析实例  

2010-11-21 21:14:38|  分类: Ansys |  标签: |举报 |字号 订阅

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上图为所建模型,下为模型全部命令流文件:

finish 
/clear
/filname,platform  
/title,platform-study  
/prep7 
et,1,pipe16
et,2,beam4 
et,3,shell63

r,1,1.2,0.03                !r1-r4针对pipe16单元,r5针对beam4单元,r6针对shell单元
r,2,0.8,0.02
r,3,0.5,0.02
r,4,0.3,0.15
r,5,0.06,0.0002,0.00045,0.3,0.2
r,6,0.02,0.02,0.02,0.02

mp,ex,1,2.0e11 
mp,nuxy,1,0.3  
mp,dens,1,7800
                           !创建导管架的关键点
k,1,-10,-7.5,0
k,2,0,-9.5,0
k,3,10,-7.5,0
k,4,10,7.5,0
k,5,0,9.5,0
k,6,-10,7.5,0
k,7,-10,0,0
k,8,-5.588,0,0
k,9,0,0,0
k,10,5.588,0,0
k,11,10,0,0
k,12,-9.454,-3.438,10.91
k,13,-9.454,3.438,10.91
k,14,0,-4.313,11.01
k,15,0,4.313,11.01
k,16,9.454,-3.438,10.91
k,17,9.454,3.438,10.91
k,18,-4.75,-7.75,10.53
k,19,4.75,-7.75,10.53
k,20,-4.75,7.75,10.53
k,32,4.75,7.75,10.53
k,21,-9,-6.25,20
k,22,0,-7.75,20
k,23,9,-6.25,20
k,24,9,6.25,20
k,25,0,7.75,20
k,26,-9,6.25,20
k,27,-9,0,20
k,28,-4.982,0,20
k,29,0,0,20
k,30,4.982,0,20
k,31,9,0,20
k,41,-8,-5,40
k,42,0,-6,40
k,43,8,-5,40
k,44,8,5,40
k,45,0,6,40
k,46,-8,5,40
k,47,-8,0,40
k,48,-4.364,0,40
k,49,0,0,40
k,50,4.364,0,40
k,51,8,0,40
k,61,-7,-3.75,60
k,62,0,-4.25,60
k,63,7,-3.75,60
k,64,7,3.75,60
k,65,0,4.25,60
k,66,-7,3.75,60
k,68,-3.72,0,60
k,70,3.72,0,60
k,81,-6,-2.5,80
k,82,0,-2.5,80
k,83,6,-2.5,80
k,84,6,2.5,80
k,85,0,2.5,80
k,86,-6,2.5,80
k,88,-3,0,80
k,90,3,0,80
                           !创建基础约束关键点
k,71,-10.1,-7.625,-2
k,72,0,-9.675,-2
k,73,10.1,-7.625,-2
k,74,10.1,7.625,-2
k,75,0,9.675,-2
k,76,-10.1,7.625,-2
                           !创建导管架-甲板连接处关键点
k,91,-6,-2.5,82
k,92,0,-2.5,82
k,93,6,-2.5,82
k,94,6,2.5,82
k,95,0,2.5,82
k,96,-6,2.5,82
                           !创建下层甲板关键点
k,101,-6,-2.5,90
k,102,0,-2.5,90
k,103,6,-2.5,90
k,104,6,2.5,90
k,105,0,2.5,90
k,106,-6,2.5,90
k,107,-8,-4.5,90
k,108,-6,-4.5,90
k,109,0,-4.5,90
k,110,6,-4.5,90
k,111,8,-4.5,90
k,112,-8,0,90
k,113,-6,0,90
k,114,0,0,90
k,115,6,0,90
k,116,8,0,90
k,117,-8,-2.5,90
k,118,8,-2.5,90
k,119,-8,2.5,90
k,120,8,2.5,90
k,121,-8,4.5,90
k,122,-6,4.5,90
k,123,0,4.5,90
k,124,6,4.5,90
k,125,8,4.5,90
                           !创建上层甲板关键点
k,151,-6,-2.5,98
k,152,0,-2.5,98
k,153,6,-2.5,98
k,154,6,2.5,98
k,155,0,2.5,98
k,156,-6,2.5,98
k,157,-9,-5.5,98
k,158,-6,-5.5,98
k,159,0,-5.5,98
k,160,6,-5.5,98
k,161,9,-5.5,98
k,162,-9,0,98
k,163,-6,0,98
k,164,0,0,98
k,165,6,0,98
k,166,9,0,98
k,167,-9,-2.5,98
k,168,9,-2.5,98
k,169,-9,2.5,98
k,170,9,2.5,98
k,171,-9,5.5,98
k,172,-6,5.5,98
k,173,0,5.5,98
k,174,6,5.5,98
k,175,9,5.5,98
                           !导管架一层水平面杆件
L,1,2
L,2,3
L,3,11
L,11,4
L,4,5
L,5,6
L,6,7
L,7,1
L,9,2
L,9,5
L,8,1
L,8,2
L,8,9
L,8,5
L,8,6
L,8,7
L,10,2
L,10,3
L,10,11
L,10,4
L,10,5
L,10,9
                           !导管架二层水平面杆件
L,21,22
L,22,23
L,23,31
L,31,24
L,24,25
L,25,26
L,26,27
L,27,21
L,29,22
L,29,25
L,28,21
L,28,22
L,28,29
L,28,25
L,28,26
L,28,27
L,30,22
L,30,23
L,30,31
L,30,24
L,30,25
L,30,29
                           !导管架三层水平面杆件
L,41,42
L,42,43
L,43,51
L,51,44
L,44,45
L,45,46
L,46,47
L,47,41
L,49,42
L,49,45
L,48,41
L,48,42
L,48,49
L,48,45
L,48,46
L,50,42
L,50,43
L,50,44
L,50,45
L,50,49
                           !导管架四层水平面杆件
L,61,62
L,62,63
L,63,64
L,64,65
L,65,66
L,66,61
L,62,65
L,68,61
L,68,62
L,68,65
L,68,66
L,70,62
L,70,63
L,70,64
L,70,65
                           !导管架五层水平面杆件
L,81,82
L,82,83
L,83,84
L,84,85
L,85,86
L,86,81
L,82,85
L,88,81
L,88,82
L,88,85
L,88,86
L,90,82
L,90,83
L,90,84
L,90,85
                           !导管架左侧面杆件
L,1,21
L,21,41
L,41,61
L,61,81
L,6,26
L,26,46
L,46,66
L,66,86
L,13,6
L,13,7
L,13,27
L,13,26
L,12,7
L,12,1
L,12,21
L,12,27
L,7,27
L,27,47
L,26,47
L,21,47
L,47,66
L,47,61
L,61,86
                           !导管架纵向中间面杆件
L,2,22
L,22,42
L,42,62
L,62,82
L,5,25
L,25,45
L,45,65
L,65,85
L,15,5
L,15,9
L,15,29
L,15,25
L,9,29
L,14,9
L,14,2
L,14,22
L,14,29
L,29,49
L,25,49
L,22,49
L,49,65
L,49,62
L,62,85
                           !导管架右侧面杆件
L,3,23
L,23,43
L,43,63
L,63,83
L,4,24
L,24,44
L,44,64
L,64,84
L,17,4
L,17,11
L,17,31
L,17,24
L,11,31
L,16,11
L,16,3
L,16,23
L,16,31
L,31,51
L,24,51
L,23,51
L,51,64
L,51,63
L,63,84
                           !导管架前立面面杆件
L,18,1
L,18,2
L,18,22
L,18,21
L,19,2
L,19,3
L,19,23
L,19,22
L,21,42
L,23,42
L,42,61
L,42,63
L,62,81
L,62,83
                           !导管架后立面面杆件
L,20,6
L,20,5
L,20,25
L,20,26
L,32,5
L,32,4
L,32,24
L,32,25
L,26,45
L,24,45
L,45,66
L,45,64
L,65,86
L,65,84
                           !导管架底端桩基础
L,1,71
L,2,72
L,3,73
L,4,74
L,5,75
L,6,76
                           !导管架甲板连接处
L,81,91
L,82,92
L,83,93
L,84,94
L,85,95
L,86,96
                           !下层甲板梁格
L,101,102
L,102,103
L,103,115
L,115,104
L,104,105
L,105,106
L,106,113
L,113,101
L,107,108
L,108,109
L,109,110
L,110,111
L,112,113
L,113,114
L,114,115
L,115,116
L,117,101
L,103,118
L,119,106
L,104,120
L,121,122
L,122,123
L,123,124
L,124,125
L,107,117
L,117,112
L,112,119
L,119,121
L,108,101
L,106,122
L,109,102
L,102,114
L,114,105
L,105,123
L,110,103
L,104,124
L,111,118
L,118,116
L,116,120
L,120,125
                           !上层甲板梁格
L,151,152
L,152,153
L,153,165
L,165,154
L,154,155
L,155,156
L,156,163
L,163,151
L,157,158
L,158,159
L,159,160
L,160,161
L,162,163
L,163,164
L,164,165
L,165,166
L,167,151
L,153,168
L,169,156
L,154,170
L,171,172
L,172,173
L,173,174
L,174,175
L,157,167
L,167,162
L,162,169
L,169,171
L,158,151
L,156,172
L,159,152
L,152,164
L,164,155
L,155,173
L,160,153
L,154,174
L,161,168
L,168,166
L,166,170
L,170,175
                           !甲板撑杆
L,91,101
L,101,151
L,92,102
L,102,152
L,93,103
L,103,153
L,94,104
L,104,154
L,95,105
L,105,155
L,96,106
L,106,156
L,91,102
L,102,93
L,94,105
L,105,96
L,91,106
L,95,102
L,93,104
L,151,102
L,102,153
L,154,105
L,105,156
L,106,151
L,104,153
L,102,155
                           !生成下层甲板
A,107,108,101,117
A,108,109,102,101
A,109,110,103,102
A,110,111,118,103
A,117,101,113,112
A,101,102,114,113
A,102,103,115,114
A,103,118,116,115
A,112,113,106,119
A,113,114,105,106
A,114,115,104,105
A,115,116,120,104
A,119,106,122,121
A,106,105,123,122
A,105,104,124,123
A,104,120,125,124
                           !生成上层甲板
A,157,158,151,167
A,158,159,152,151
A,159,160,153,152
A,160,161,168,153
A,167,151,163,162
A,151,152,164,163
A,152,153,165,164
A,153,168,166,165
A,162,163,156,169
A,163,164,155,156
A,164,165,154,155
A,165,166,170,154
A,169,156,172,171
A,156,155,173,172
A,155,154,174,173
A,154,170,175,174
                    !网格划分
Lsel,s,,,95,102                    !选择导管架的竖向主导管
Lsel,a,,,118,125
Lsel,a,,,141,148
Lsel,a,,,192,203
Latt,1,1,1
Lesize,all,,,1
Lmesh,all

Lsel,s,,,1,94                   !选择导管架的竖向主导管
Lsel,a,,,103,117
Lsel,a,,,126,140
Lsel,a,,,149,191
Latt,1,3,1
Lesize,all,,,1
Lmesh,all

Lsel,s,,,284,295                   !选择甲板部分主导管
Latt,1,2,1
Lesize,all,,,1
Lmesh,all

Lsel,s,,,296,319                  !选择甲板部分的撑杆
Latt,1,4,1
Lesize,all,,,1
Lmesh,all

Lsel,s,,,192,283                  !选择甲板梁格线段
Latt,1,5,2,,,,1
Lesize,all,,,3
Lmesh,all

asel,s,,,all                  !选择甲板平面
aatt,1,6,3
amesh,all
/eshape,1
allsel

nsel,s,loc,z,-2                  !约束底部节点
d,all,all
finish
!******************************************************
!模态分析
allsel
/solu
antype,modal
modopt,lanb,6                 !采用Block Lanzcos法提取前六个模态
modopt,lanb,6,0,0,,off        !采用默认设置
solve
finish
!******************************************************
!谐振分析(谐振分析用于确定结构在随时间按照正弦规律变化的载荷作用下的稳态反应,目的计算结构反应随频率的变化曲线。

本例是在海洋平台模态分析的基础上,计算在前六阶固有频率的范围内,承受单位简谐荷载的位移反应曲线。)
allsel
/solu
ANTYPE,harmonic
hropt,full
pstres,0                      !关闭预应力选项
harfrq,0,5,                   !设置频率范围为0-5Hz
nsubst,20,                    !设置荷载子步数为20
kbc,ramped                    !kbc,0

f,5,fy,1,0                    !在节点5和25上施加荷载,实部为1,虚部为0
f,25,fy,1,0
solve
finish

/post26
nsol,2,73,u,y,uy
/axlab,x,Frequency           !设置x,y轴的变量名称
/axlab,y,uy
plvar,2
finish

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