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ANSYS中使用COMBIN39单元的实例


ANSYS 中使用 COMBIN39 单元的实例 1
转贴个例子吧 finish /clear /units,si /prep7 antype,static et,1,solid65 r,1, MPTEMP,,,,,,,, MPTEMP,1,0 MPDATA,EX,1,,1.97e9 MPDATA,PRXY,1,,0.27 TB,BKIN,1,1,2,1 TBTEMP,

0 TBDATA,,1.97e6,,,,, TB,CONC,1,1,9, TBTEMP,0 TBDATA,,0,1,0.4e6,-1,, TBDATA,,,,,,, blc4,,,300,300,1400

*do,i,1,8,1 lesize,i,50 *enddo *do,i,9,12,1 lesize,i,100 *enddo vmesh,1 et,2,link8 !是否应用 PIPE 单元 r,2,0.000576 mp,ex,2,2.1e11 mp,prxy,2,0.3 type,2 mat,2 real,2 k,11,150,150 k,12,150,150,1400 l,11,12 lesize,13,100

lmesh,13

et,3,combin39 keyopt,3,3,3 mp,ex,3,36534 r,3,0.012,340.98,0.023144013,676.822,0.041007667,1009.222 rmore,0.060508355,1329.6,0.078506,1669.288667,0.13106,2006.533333 rmore,0.200204,2332.511333,0.297857,2678.866667,0.381036,3004.466667 rmore,0.491887,3340.466667,0.634276,3667.711333,2.961887,3864.733333 rmore,2.989726,3982.733333,3.05323,4143.8,3.141894,4204.355333 rmore,3.16088,4294.266667,3.232973,4385.644667,3.244492,4473.044667 rmore,3.333723,4047.6, type,3 mat,3 real,3 e,37,736 e,86,737 *do,i,567,579,1 e,i,i+171 *enddo save et,4,shell63 r,4,0.015,0.015,0.015,0.015 mp,ex,4,2.5e4 mp,prxy,4,0.3 type,4 mat,4 real,4 asel,,,,3,6,1 aatt,4,4,4, amesh,3,6,1 allsel finish /solu

nsel,s,loc,z,1400 nsel,r,loc,x,0 d,all,all

allsel nsel,s,loc,z,1400 nsel,r,loc,x,300 d,all,all allsel time,0 *do,i,1,11,1 time,i f,737,fz,5000*i cnvtol,f,,0.1,2 nropt,full outres,all,all nsubst,10 nlgeom,on solve fdele,all *enddo *do,i,12,25,1 f,737,fz,55000+2500*(i-11) time,i cnvtol,f,,0.05,2 nropt,full outres,all,all nsubst,10 nlgeom,on solve fdele,all *enddo

ANSYS 中使用 COMBIN39 单元的实例 2
/PREP7 ANTYPE,TRANS ! NONLINEAR TRANSIENT DYNAMIC ANALYSIS ET,1,COMBIN39,,,2 ! ELEMENT WITH DISPLACEMENT ALONG NODAL Y-AXIS ET,2,MASS21,,,4 ! MASS WITHOUT ROTARY INERTIA R,1,0.0,0.0,.1,.204,.2,.432 ! SPRING DATA RMORE,.3,.708,.4,1.056,.5,1.5 RMORE,.6,2.064,.7,2.772,.8,3.648 RMORE,.9,4.716,1.0,6.0 R,2,2588E-6 ! MASS DATA

N,1 N,2 E,1,2 TYPE,2 REAL,2 E,2 D,1,ALL D,2,UX IC,2,UY,-1 ! INITIAL DISPLACEMENT AND VELOCITY KBC,1 ! STEP LOADING SAVE FINISH /SOLU SOLCONTROL,0 CNVTOL,F,1,1E-4 ! FORCE CONVERGENCE CRITERIA OUTRES,NSOL,1 NSUBST,5 OUTPR,BASIC,NONE TIME,.0002 ! TIME TO ALLOW INITIAL CHANGE IN ACCELERATION LSWRITE ! WRITE LOAD STEP FILE 1 NSUBST,40 OUTPR,BASIC,LAST TIME,0.18 ! TIME ARBITRARILY SELECTED LSWRITE ! WRITE LOAD STEP FILE 2 LSSOLVE,1,2,1 ! READ IN 2 LOAD STEPS AND SOLVE FINISH /POST26 TIMERANGE,.003,.18 NSOL,2,2,U,Y,2UY PRVAR,2 ! PRINT DISPLACEMENTS *GET,PER,VARI,2,EXTREM,TMIN *status,parm FINISH

frp 钢筋混凝土加固梁的粘结滑移问题
我最近在做 frp 钢筋混凝土加固梁的剥离问题,采用 ansys 建立模型。solid65 模拟混凝土,combin39 单元来模拟 frp 与混凝土之间的粘结滑移,有一些错误,希望高手们有时间帮我看看。多谢了 很多人说,采用 ansys 算粘结滑移很难算到收敛,但是不知道有没有算出来的,只要有可能,我就不放弃 了。 命令流如下: !第一组

/prep7 !定义参数和单元类型 !混凝土参数 *SET,hntra,20.5 *SET,ec,28800 *SET,possible,0.3 *SET,hntrl,2.35 !FRP 参数 *SET,ff,1800 *SET,ef,220000 !抗拉强度 !弹性模量

!FRP 纤维布的极限拉应变 *SET,ckf,ff/ ef !FRP 厚度 *SET,tf,0.121*2 et,1,solid65 KEYOPT,1,1,1 KEYOPT,1,7,1 et,2,link8 et,3,shell43 et,4,solid45 !定义实常数 r,1,50.3 r,2,28.3 r,3 R,4,tf,tf,tf,tf,,, RMORE,, r,5 !垫块 !纵向受拉钢筋实常数 !纵向受压钢筋,箍筋实常数 !混凝土 !frp 的实常数 !混凝土单元 !不考虑大变形 !考虑应力松弛,有助于计算收敛 !钢筋单元 !模拟 frp 布 !刚性垫块

ET,5,COMBIN39 !法向弹簧 keyopt,5,1,0 keyopt,5,2,1 KEYOPT,5,3,3 r,6,0,0,0.0005,29340,0.001,41577 !粘结滑移关系

rmore,0.005,92970,0.01,131478,0.015,161028 rmore,0.02,185939,0.025,207886,0.029214,224725 !定义材料属性 mp,ex,1,ec !混凝土材料属性

mp,prxy,1,possible

tb,conc,1

!混凝土自带的破坏准则

tbdata,,0.5,0.9,hntrl,-1 !混凝土本构关系 tb,miso,1,,23 tbpt,,0.000005,hntra*0.0074627 tbpt,,0.00001,hntra*0.00992537 tbpt,,0.00005,hntra*0.0491293 tbpt,,0.0001,hntra* 0.0970149 tbpt,,0.0002,hntra*0.19 tbpt,,0.0004,hntra*0.36 tbpt,,0.0006,hntra*0.51 tbpt,,0.0008,hntra*0.64 tbpt,,0.0010,hntra*0.75 tbpt,,0.0012,hntra*0.84 tbpt,,0.0014,hntra*0.91 tbpt,,0.0016,hntra*0.96 tbpt,,0.0018,hntra*0.99 tbpt,,0.0020,hntra*1.00 tbpt,,0.0022,hntra*0.98 tbpt,,0.0024,hntra*0.97 tbpt,,0.0026,hntra*0.95 tbpt,,0.0028,hntra*0.93 tbpt,,0.003,hntra*0.92 tbpt,,0.0032,hntra*0.9 tbpt,,0.0034,hntra*0.88 tbpt,,0.0036,hntra*0.87 tbpt,,0.0038,hntra*0.85

mp,ex,2,1.94e5 mp,prxy,2,0.3 tb,bkin,2,1,2,1 tbdata,,368.3,2000 mp,ex,3,1.97e5 mp,prxy,3,0.3 tb,bkin,3,1,2,1 tbdata,,410.6,2000 !定义 FRP mp,ex,4,ef mp,prxy,4,0.3

!纵向受拉钢筋

!横向箍筋,受压钢筋材料属性

mp,ex,5,ec

!垫块材料属性

mp,prxy,5,possible

!建模 blc4,,,100,200,-1100 k,9,20,40,0 k,10,20,40,-1100 l,9,10 lgen,2,13,,,60 lsel,s,line,,13,14 LPLOT CM,zlj,LINE allsel,all lgen,2,13,,,,120 lgen,2,14,,,,120 lsel,s,line,,15,16 lplot cm,zyj,line allsel,all k,17,20,40,-500 k,18,80,40,-500 k,19,20,160,-500 l,17,18 l,17,19 lgen,2,17,,,,120 lgen,2,18,,,60 lsel,s,line,,17,20,1 LPLOT *do,ii,1,5 lgen,2,17,20,1,,,-ii*100 ii=ii+1 *enddo LPLOT cm,gj,line !箍筋 !钢筋

WPAVE,0,0,0 wprota,,90 wpoffs,,,0.835 blc4,,,100,-1000

!CFRP !旋转工作平面 yz,90° !偏移工作平面 z cfrp 面与混凝土面之间距离为 0.835mm

wpoffs,,,-0.835 wpoffs,,-1100 blc4,,,100,100,20 wpoffs,,600 wpoffs,,,-200 wprota,,-90 blc4,,,100,20,-100 allsel,all !划分单元 VSEL,s,volu,,1 VATT,1,3,1 LSEL,s,line,,12 LSEL,a,line,,7 LSEL,a,line,,8

!支座面与 cfp 下表面距离为 0.835mm !支座处混凝土垫块 100*100*20

!荷载处混凝土垫块是 100*100*20

!混凝土 网格划分较细为 25*50*25

LESIZE,12,50,,,,,,,0 LESIZE,7,20,,,,,,,0 LESIZE,8,20,,,,,,,0 MSHAPE,0,3D MSHKEY,1 VMESH,1 cmsel,s,zlj,line lATT,2,1,2 LESIZE,all,50,,,,,,,0 LMESH,all cmsel,s,zyj,line lATT,3,2,2 LESIZE,all,50,,,,,,,0 LMESH,all cmsel,s,gj,line lplot lATT,3,2,2 LESIZE,all,20,,,,,,,0 LMESH,all asel,s,area,,7 aplot AATT,3,4,3 lsel,s,,,42 lsel,a,,,43 !CFRP 划分单元为四边形 20*50 !箍筋为 20mm !主 ya 筋划分为 50mm !主 la 筋划分为 50mm

LESIZE,42,50,,,,,,,0 LESIZE,43,20,,,,,,,0 mshape,0,2D MSHKEY,1 AMESH,7 allsel,all VSEL,s,,,2 VATT,5,3,4 LESIZE,50,50,,,,,,,0 LESIZE,51,20,,,,,,,0 LESIZE,55,20,,,,,,,0 LESIZE,47,50,,,,,,,0 LESIZE,49,20,,,,,,,0 LESIZE,53,20,,,,,,,0 MSHAPE,0,3D MSHKEY,1 VMESH,all /VIEW,1,1,1,1 allsel,all VSEL,s,,,3 VATT,5,3,4 LESIZE,67,50,,,,,,,0 LESIZE,62,20,,,,,,,0 LESIZE,61,20,,,,,,,0 LESIZE,66,50,,,,,,,0 LESIZE,57,20,,,,,,,0 LESIZE,58,20,,,,,,,0 MSHAPE,0,3D MSHKEY,1 VMESH,all allsel,all nsel,s,loc,y,-0.835,0 nplot TYPE,5 REAL,6 ESYS,0 eintf,0.84,,low allsel,all nsel,s,loc,y,-1.67,0 !混凝土和 CFRP 界面重合节点 约束 UX UY 方向 !结点号码从最低点到最高点编号 !弹簧单元 0 !划分支座垫块为 25*50*20 !选择体 2 !划分支座垫块为 25*50*20 !选择体 2

CPINTF,UX,1.67 CPINTF,Uy,1.67 nsel,s,loc,y,-1.67,-0.835 !cfrp 内部结点耦合 CPINTF,Uz,0.835 ALLSEL,ALL CPINTF,UX CPINTF,Uy CPINTF,Uz allsel,all !求解设置 /solu antype,0 allsel,all asel,s,,,9 da,all,ux da,all,uy allsel,all asel,s,loc,z,0 da,all,symm allsel,all asel,s,,,17 sfa,all,,pres,2.456 allsel,all autots,on time,1 nsubst,100 lnsrch,on pred,on outres,basic,all ncnv,2 allsel,all SOLVE FINISH 有一些错误,请高手们帮我看看 *** ERROR *** SUPPRESSED MESSAGE CP = 7.375 TIME= 21:16:15 !施加外部载荷 !对称面约束 !右边界约束 !其他节点耦合

Node 154 direction UY included in coupled sets 696 and 275.


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