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starkyu新蟲 (初入文壇)
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[求助]
[求助]用ANSYS耦合平面出現(xiàn)的錯(cuò)誤~設(shè)置了周期對(duì)稱的節(jié)點(diǎn)還能再進(jìn)行平面耦合約束么？
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對(duì)螺栓法蘭連接系統(tǒng)進(jìn)行分析，設(shè)置的是周期對(duì)稱邊界條件，考慮螺栓的預(yù)緊力，其余的邊界條件是想在法蘭一端進(jìn)行軸向約束，另一端進(jìn)行一個(gè)平面耦合Y方向的約束，但是每次以計(jì)算就會(huì)出現(xiàn)如下錯(cuò)誤： *** 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. 已經(jīng)糾結(jié)了好多天，實(shí)在不知道要怎么解決，求大神幫忙~~ |
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5樓2013-10-28 17:38:08
【答案】應(yīng)助回帖
★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感謝參與，應(yīng)助指數(shù) +1
starkyu: 金幣+10, ★★★很有幫助, 難得有人回答 去研究一下 謝謝了~ 2013-10-25 15:34:44
感謝參與，應(yīng)助指數(shù) +1
starkyu: 金幣+10, ★★★很有幫助, 難得有人回答 去研究一下 謝謝了~ 2013-10-25 15:34:44
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我這里有一個(gè)實(shí)例你看一下《螺栓預(yù)緊法蘭盤襯墊分析》 /FILNAME,Ring Flange,0 /PREP7 H1=0.01 !法蘭盤1的厚度 H2=0.002 !襯墊厚度 H3=0.01 !法蘭盤2的厚度 H4=0.008 !螺帽的厚度 R1=0.05 !法蘭盤內(nèi)半徑 R2=0.08 !法蘭盤外半徑 R3=(R2-R1)/2+R1 !螺栓中心位置 R4=0.5*(R2-R1)/2!螺栓半徑 R5=0.7*(R2-R1)/2!螺帽半徑 ET,1,186 ET,2,194 MP,EX,1,1.05E11 MP,NUXY,1,0.3 TB,GASKET,2,,13,COMP !材料壓縮曲線 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 !定義襯墊的線性卸載曲線 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 !定義圓柱體 CYLIND,R1,R2,H1,H1+H2,0,360 !定義圓柱體 CYLIND,R1,R2,H1+H2,H1+H2+H3,0,360!定義圓柱體 NUMMRG,ALL !合并所有實(shí)體 CYLIND,R4,0,0,H1+H2+H3,0,360, !定義圓柱體 VGEN,,4,,,R3,,,,,1 !移動(dòng)圓柱體 CSYS,1 !激活總體柱坐標(biāo)系 !復(fù)制圓柱體 VGEN,2,4,,,,90,,,0 VGEN,2,4,,,,180,,,0 VGEN,2,4,,,,270,,,0 !把圓柱體從法蘭盤中減去 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 !定義圓柱體 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 !把體4,5和6進(jìn)行加運(yùn)算 VADD,4,5,6 CSYS,0 !激活總體笛卡爾坐標(biāo)系 VGEN,,7,,,R3,,,,,1 CSYS,1 VGEN,2,7,,,,90,,,0 VGEN,2,7,,,,180,,,0 VGEN,2,7,,,,270,,,0 !設(shè)置總體單元尺寸 ESIZE,0.005 TYPE,1 MAT,1 VSWEEP,2 !劃分襯墊單元 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 !定義預(yù)拉伸單元 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, , , , , !定義接觸單元節(jié)點(diǎn)組1 ASEL,S, , ,48 NSLA,S,1 CM,CN1,NODE ALLSEL,ALL !定義接觸單元節(jié)點(diǎn)組2 ASEL,S, , ,28 NSLA,S,1 CM,CN2,NODE ALLSEL,ALL !定義目標(biāo)單元節(jié)點(diǎn)組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 !定義目標(biāo)單元節(jié)點(diǎn)組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 !通過接觸向?qū)Ы⒔佑|對(duì) 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 !激活總體柱坐標(biāo)系 NSEL,S,LOC,X,R1 !選擇法蘭盤內(nèi)空上的所有節(jié)點(diǎn) /PREP7 NROTAT,ALL !把選中的節(jié)點(diǎn)轉(zhuǎn)到總體柱坐標(biāo)系中 /SOL D,ALL,,,,,,UX,,,,, !約束法蘭盤內(nèi)徑的徑向位移 D,ALL,,,,,,UY,,,,, !約束法蘭盤內(nèi)徑的周向位移 ALLSEL,ALL CSYS,0 !施加預(yù)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 |
2樓2013-10-25 10:29:37
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錯(cuò)誤 1： 一個(gè)節(jié)點(diǎn)只能在一個(gè)耦合方程中做為從節(jié)點(diǎn)。因?yàn)楣?jié)點(diǎn)耦合的意思是使從節(jié)點(diǎn)的位移自由度與主節(jié)點(diǎn)的自由度相對(duì)，如果一個(gè)節(jié)點(diǎn)同時(shí)存在于兩個(gè)耦合中，那么它到底和哪一個(gè)主節(jié)點(diǎn)的自由度相等呢？ 錯(cuò)誤 2： 一個(gè)節(jié)點(diǎn)的 Uy 自由度既出現(xiàn)在某個(gè)約束方程中，又是一個(gè)節(jié)點(diǎn)耦合中的從節(jié)點(diǎn)，處理時(shí)會(huì)造成混亂。軟件建議將節(jié)點(diǎn)耦合也修改為約束方程。 |
3樓2013-10-26 08:24:55
starkyu
新蟲 (初入文壇)
- 應(yīng)助: 0 (幼兒園)
- 金幣: 178.5
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- 在線: 19.5小時(shí)
- 蟲號(hào): 1887945
- 注冊(cè): 2012-07-11
- 專業(yè): 機(jī)械結(jié)構(gòu)強(qiáng)度學(xué)
4樓2013-10-27 09:16:56
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