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[求助]
[求助]用ANSYS耦合平面出现的错误~设置了周期对称的节点还能再进行平面耦合约束么？
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对螺栓法兰连接系统进行分析，设置的是周期对称边界条件，考虑螺栓的预紧力，其余的边界条件是想在法兰一端进行轴向约束，另一端进行一个平面耦合Y方向的约束，但是每次以计算就会出现如下错误： *** ERROR *** CP = 91.885 TIME= 20:02:29 Constraint equation 940 has node 1 = 1898 degree of freedom = UY which is also a slave in coupled set 1. *** ERROR *** CP = 91.994 TIME= 20:02:30 Degree of freedom UY at node 2312 is both in constraint equation 940 and a slave degree of freedom of coupled set 1, which may cause a problem. Please replace the CP,1,UY,1896,...,2312,..., command with the CE,next,0.0,2312,UY,-1.0,1896,UY,1.0 command. 已经纠结了好多天，实在不知道要怎么解决，求大神帮忙~~ |
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【答案】应助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与，应助指数 +1
starkyu: 金币+10, ★★★很有帮助, 难得有人回答 去研究一下 谢谢了~ 2013-10-25 15:34:44
感谢参与，应助指数 +1
starkyu: 金币+10, ★★★很有帮助, 难得有人回答 去研究一下 谢谢了~ 2013-10-25 15:34:44
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我这里有一个实例你看一下《螺栓预紧法兰盘衬垫分析》 /FILNAME,Ring Flange,0 /PREP7 H1=0.01 !法兰盘1的厚度 H2=0.002 !衬垫厚度 H3=0.01 !法兰盘2的厚度 H4=0.008 !螺帽的厚度 R1=0.05 !法兰盘内半径 R2=0.08 !法兰盘外半径 R3=(R2-R1)/2+R1 !螺栓中心位置 R4=0.5*(R2-R1)/2!螺栓半径 R5=0.7*(R2-R1)/2!螺帽半径 ET,1,186 ET,2,194 MP,EX,1,1.05E11 MP,NUXY,1,0.3 TB,GASKET,2,,13,COMP !材料压缩曲线 TBPT,,0.508000E-04, 0.161226E+07 TBPT,,0.101600E-03, 0.520884E+07 TBPT,,0.152400E-03, 0.113134E+08 TBPT,,0.203200E-03, 0.200499E+08 TBPT,,0.254000E-03, 0.259960E+08 TBPT,,0.304800E-03, 0.290345E+08 TBPT,,0.355600E-03, 0.357453E+08 TBPT,,0.406400E-03, 0.440064E+08 TBPT,,0.457200E-03, 0.563189E+08 TBPT,,0.508000E-03, 0.748254E+08 TBPT,,0.558800E-03, 0.967287E+08 TBPT,,0.609600E-03, 0.129001E+09 TBPT,,0.683260E-03, 0.157147E+09 TB,GASKET,2,,5,LUNL !定义衬垫的线性卸载曲线 TBPT,,0.152400E-03, 2.430000E+11 TBPT,,0.304800E-03, 3.565000E+11 TBPT,,0.406400E-03, 5.923000E+11 TBPT,,0.558800E-03, 1.088000E+12 TBPT,,0.683260E-03, 1.490000E+12 CYLIND,R1,R2,0,H1,0,360 !定义圆柱体 CYLIND,R1,R2,H1,H1+H2,0,360 !定义圆柱体 CYLIND,R1,R2,H1+H2,H1+H2+H3,0,360!定义圆柱体 NUMMRG,ALL !合并所有实体 CYLIND,R4,0,0,H1+H2+H3,0,360, !定义圆柱体 VGEN,,4,,,R3,,,,,1 !移动圆柱体 CSYS,1 !激活总体柱坐标系 !复制圆柱体 VGEN,2,4,,,,90,,,0 VGEN,2,4,,,,180,,,0 VGEN,2,4,,,,270,,,0 !把圆柱体从法兰盘中减去 FLST,2,3,6,ORDE,2 FITEM,2,1 FITEM,2,-3 VSBV,P51X,4 FLST,2,3,6,ORDE,2 FITEM,2,8 FITEM,2,-10 VSBV,P51X,5 FLST,2,3,6,ORDE,2 FITEM,2,1 FITEM,2,-3 VSBV,P51X,6 FLST,2,3,6,ORDE,3 FITEM,2,4 FITEM,2,-5 FITEM,2,8 VSBV,P51X,7 !定义圆柱体 CYLIND,R4*0.95,0,0,H1+H2+H3,0,360 CYLIND,R5,0,H1+H2+H3,H1+H2+H3+H4,0,360 CYLIND,R5,0,-H4,0,0,360 !把体4,5和6进行加运算 VADD,4,5,6 CSYS,0 !激活总体笛卡尔坐标系 VGEN,,7,,,R3,,,,,1 CSYS,1 VGEN,2,7,,,,90,,,0 VGEN,2,7,,,,180,,,0 VGEN,2,7,,,,270,,,0 !设置总体单元尺寸 ESIZE,0.005 TYPE,1 MAT,1 VSWEEP,2 !划分衬垫单元 TYPE,2 MAT,2 IMESH,AREA,19,25, ,0,0,H2,0.0005 TYPE,1 MAT,1 VSWEEP,3 MSHKEY,0 MSHAPE,1,3D VMESH,4 VMESH,5 VMESH,6 VMESH,7 !定义预拉伸单元 PSMESH, ,P1, ,VOLU,4, 0,Z,(H1+H2+H3)/2,,,,, PSMESH, ,P2, ,VOLU,5, 0,Z,(H1+H2+H3)/2, , , , , PSMESH, ,P3, ,VOLU,6, 0,Z,(H1+H2+H3)/2, , , , , PSMESH, ,P4, ,VOLU,7, 0,Z,(H1+H2+H3)/2, , , , , !定义接触单元节点组1 ASEL,S, , ,48 NSLA,S,1 CM,CN1,NODE ALLSEL,ALL !定义接触单元节点组2 ASEL,S, , ,28 NSLA,S,1 CM,CN2,NODE ALLSEL,ALL !定义目标单元节点组1 FLST,5,4,5,ORDE,4 FITEM,5,50 FITEM,5,54 FITEM,5,64 FITEM,5,74 ASEL,S, , ,P51X NSEL,ALL NSLA,S,1 CM,TN1,NODE ALLSEL,ALL !定义目标单元节点组1 FLST,5,4,5,ORDE,4 FITEM,5,70 FITEM,5,80 FITEM,5,53 FITEM,5,60 ASEL,S, , ,P51X NSEL,ALL NSLA,S,1 CM,TN2,NODE ALLSEL,ALL !通过接触向导建立接触对 CM,_NODECM,NODE CM,_ELEMCM,ELEM CM,_KPCM,KP CM,_LINECM,LINE CM,_AREACM,AREA CM,_VOLUCM,VOLU /GSAV,cwz,gsav,,temp MP,MU,1,0.25 MAT,1 MP,EMIS,1,7.88860905221e-031 R,3 REAL,3 ET,4,170 ET,5,174 R,3,,,1.0,0.1,0, RMORE,,,1.0E20,0.0,1.0, RMORE,0.0,0,1.0,,1.0,0.5 RMORE,0,1.0,1.0,0.0,,1.0 KEYOPT,5,4,0 KEYOPT,5,5,0 NROPT,UNSYM KEYOPT,5,7,0 KEYOPT,5,8,0 KEYOPT,5,9,0 KEYOPT,5,10,2 KEYOPT,5,11,0 KEYOPT,5,12,0 KEYOPT,5,2,0 KEYOPT,4,5,0 ! Generate the target surface NSEL,S,,,TN1 CM,_TARGET,NODE TYPE,4 ESLN,S,0 ESURF CMSEL,S,_ELEMCM ! Generate the contact surface NSEL,S,,,CN1 CM,_CONTACT,NODE TYPE,5 ESLN,S,0 ESURF ALLSEL ESEL,ALL ESEL,S,TYPE,,4 ESEL,A,TYPE,,5 ESEL,R,REAL,,3 /PSYMB,ESYS,1 /PNUM,TYPE,1 /NUM,1 EPLOT ESEL,ALL ESEL,S,TYPE,,4 ESEL,A,TYPE,,5 ESEL,R,REAL,,3 CMSEL,A,_NODECM CMDEL,_NODECM CMSEL,A,_ELEMCM CMDEL,_ELEMCM CMSEL,S,_KPCM CMDEL,_KPCM CMSEL,S,_LINECM CMDEL,_LINECM CMSEL,S,_AREACM CMDEL,_AREACM CMSEL,S,_VOLUCM CMDEL,_VOLUCM /GRES,cwz,gsav CMDEL,_TARGET CMDEL,_CONTACT CM,_NODECM,NODE CM,_ELEMCM,ELEM CM,_KPCM,KP CM,_LINECM,LINE CM,_AREACM,AREA CM,_VOLUCM,VOLU /GSAV,cwz,gsav,,temp MP,MU,1,0.25 MAT,1 MP,EMIS,1,7.88860905221e-031 R,4 REAL,4 ET,6,170 ET,7,174 R,4,,,1.0,0.1,0, RMORE,,,1.0E20,0.0,1.0, RMORE,0.0,0,1.0,,1.0,0.5 RMORE,0,1.0,1.0,0.0,,1.0 KEYOPT,7,4,0 KEYOPT,7,5,0 NROPT,UNSYM KEYOPT,7,7,0 KEYOPT,7,8,0 KEYOPT,7,9,0 KEYOPT,7,10,2 KEYOPT,7,11,0 KEYOPT,7,12,0 KEYOPT,7,2,0 KEYOPT,6,5,0 ! Generate the target surface NSEL,S,,,TN2 CM,_TARGET,NODE TYPE,6 ESLN,S,0 ESURF CMSEL,S,_ELEMCM ! Generate the contact surface NSEL,S,,,CN2 CM,_CONTACT,NODE TYPE,7 ESLN,S,0 ESURF ALLSEL ESEL,ALL ESEL,S,TYPE,,6 ESEL,A,TYPE,,7 ESEL,R,REAL,,4 /PSYMB,ESYS,1 /PNUM,TYPE,1 /NUM,1 EPLOT ESEL,ALL ESEL,S,TYPE,,6 ESEL,A,TYPE,,7 ESEL,R,REAL,,4 CMSEL,A,_NODECM CMDEL,_NODECM CMSEL,A,_ELEMCM CMDEL,_ELEMCM CMSEL,S,_KPCM CMDEL,_KPCM CMSEL,S,_LINECM CMDEL,_LINECM CMSEL,S,_AREACM CMDEL,_AREACM CMSEL,S,_VOLUCM CMDEL,_VOLUCM /GRES,cwz,gsav CMDEL,_TARGET CMDEL,_CONTACT /SOL CSYS,1 !激活总体柱坐标系 NSEL,S,LOC,X,R1 !选择法兰盘内空上的所有节点 /PREP7 NROTAT,ALL !把选中的节点转到总体柱坐标系中 /SOL D,ALL,,,,,,UX,,,,, !约束法兰盘内径的径向位移 D,ALL,,,,,,UY,,,,, !约束法兰盘内径的周向位移 ALLSEL,ALL CSYS,0 !施加预拉伸力 *DEL,_z *DIM,_z,ARRAY,1,1,1 *SET,_z(1) ,1 *DO,_z1,1,1 SLOAD,_z(_z1),9,LOCK,FORC, 1000,1,2 *ENDDO *DEL,_z *DIM,_z,ARRAY,1,1,1 *SET,_z(1) ,2 *DO,_z1,1,1 SLOAD,_z(_z1),9,LOCK,FORC, 1000,1,2 *ENDDO *DEL,_z *DIM,_z,ARRAY,1,1,1 *SET,_z(1) ,3 *DO,_z1,1,1 SLOAD,_z(_z1),9,LOCK,FORC, 1000,1,2 *ENDDO *DEL,_z *DIM,_z,ARRAY,1,1,1 *SET,_z(1) ,4 *DO,_z1,1,1 SLOAD,_z(_z1),9,LOCK,FORC, 1000,1,2 *ENDDO SOLVE |
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