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焊接应力场分析总出现某节点位移过大的错误怎么回事
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在做复杂模型前，我先试着做了一个简单模型的焊接，以下是命令流，没有用高斯热源之类的。温度场分析没问题，一开始应力场分析就一直出现“ The value of UX at node 108334 is 5.212138364E+25. It is greater than the current limit of 1000000. This generally indicates rigid body motion as a result of an unconstrained model. Verify that your model is properly constrained. ”这样的错误，我一直在修改约束，但还是这个问题，只不过变成其他节点位移过大，不知道是不是源头上方法就是错误的，我也是学习一个类似的命令流做的，请各位指点一二，到底应该怎样修改啊，急啊，困好久了~ finish /clear /units,si /prep7 Et,1,shell57 MPTEMP,,,,,,,, MPTEMP,1,20 MPTEMP,2,200 MPTEMP,3,500 MPTEMP,4,750 MPTEMP,5,1000 MPTEMP,6,1500 MPTEMP,7,1700 MPTEMP,8,2500 MPDATA,KXX,1,,50 MPDATA,KXX,1,,47 MPDATA,KXX,1,,40 MPDATA,KXX,1,,27 MPDATA,KXX,1,,30 MPDATA,KXX,1,,35 MPDATA,KXX,1,,40 MPDATA,KXX,1,,55 MPDATA,DENS,1,,7820 MPDATA,DENS,1,,7700 MPDATA,DENS,1,,7610 MPDATA,DENS,1,,7550 MPDATA,DENS,1,,7490 MPDATA,DENS,1,,7350 MPDATA,DENS,1,,7300 MPDATA,DENS,1,,7090 MPDATA,C,1,,460 MPDATA,C,1,,480 MPDATA,C,1,,530 MPDATA,C,1,,675 MPDATA,C,1,,670 MPDATA,C,1,,660 MPDATA,C,1,,780 MPDATA,C,1,,820 MPDATA,EX,1,,2.05E11 MPDATA,EX,1,,1.87E11 MPDATA,EX,1,,1.5E11 MPDATA,EX,1,,0.7E11 MPDATA,EX,1,,0.2E11 MPDATA,EX,1,,0.19E2 MPDATA,EX,1,,0.18E2 MPDATA,EX,1,,0.12e2 MPDATA,PRXY,1,,0.28 MPDATA,PRXY,1,,0.29 MPDATA,PRXY,1,,0.31 MPDATA,PRXY,1,,0.35 MPDATA,PRXY,1,,0.4 MPDATA,PRXY,1,,0.45 MPDATA,PRXY,1,,0.48 MPDATA,PRXY,1,,0.5 UIMP,1,REFT,,,20 MPDATA,ALPX,1,,1.1e-5 MPDATA,ALPX,1,,1.22e-5 MPDATA,ALPX,1,,1.39e-5 MPDATA,ALPX,1,,1.48e-5 MPDATA,ALPX,1,,1.34e-5 MPDATA,ALPX,1,,1.33e-5 MPDATA,ALPX,1,,1.32e-5 MPDATA,ALPX,1,,1.31e-5 TB,BISO,1,6,2, TBTEMP,20 TBDATA,,220e6,0,,,, TBTEMP,250 TBDATA,,175e6,0,,,, TBTEMP,500 TBDATA,,80e6,0,,,, TBTEMP,750 TBDATA,,40E6,0,,,, TBTEMP,1000 TBDATA,,10E6,0,,,, TBTEMP,1500 TBDATA,,1E-5,0,,,, k,1,0.5,0 k,2,0.5,2.2 k,3,-0.5,2.2 k,4,-0.5,0 *do,i,1,3 l,i,i+1 *enddo l,1,4 k,100,0.5,,4 l,1,100 xx_1=_return *get,lmax,line,,num,max *do,i,1,lmax-1 adrag,i,,,,,,xx_1 *enddo ldele,lmax wpoffs,,,0.5 asbw,all wpoffs,,,0.5 asbw,all wpoffs,,,0.005 asbw,all wpoffs,,,0.005 asbw,all wpoffs,,,0.99 asbw,all wpoffs,,,1 asbw,all numcmp,all nummrg,all r,1,0.032 mshape,1 mshkey,1 esize,0.005 asel,s,loc,z,1,1.01 amesh,all esize,0.02 asel,s,loc,z,0.5,1 asel,a,loc,z,1.01,2 amesh,all esize,0.1 asel,s,loc,z,0,0.5 asel,a,loc,z,2,4 amesh,all *set,l,2.220 *set,v,0.005 /solu antype,4 ic,all,temp,20 timint,0,struct timint,1,therm timint,0,mag tintp,0.005,,,1,0.5,0.2 asel,s,loc,x,0.5 asel,r,loc,x,1,1.01 asel,inve sfa,all,1,conv,30,20 nropt,full,,on !牛顿迭代 autots,1 !时间不跟踪 kbc,1 !阶越载荷的施加 lnsrch,1 !打开线性搜索 tsres,erase !去掉时间表格 outres,basic,last outpr,basic,last !!!!!!!!!生死单元循环求解!!!!!!!!!!!!!!! allsel,all asel,s,loc,x,0.5 asel,r,loc,z,1,1.01 esla,s ekill,all *do,t,0,l/v,4 asel,s,loc,x,0.5 asel,r,loc,z,1,1.01 esla,s nsle,s nsel,r,loc,y,v*t,v*(t+4) cm,weld,node cmsel,s,weld esln,s, ealive,all esel,s,live t=t+4 time,t f,weld,heat,2500 nsubst,4 allsel,all solve allsel,all fdele,all,heat *enddo save !应力场求解 finish /prep7 etchg,tts /solu antype,4 outpr,basic,last outres,basic,last kbc,0 nlgeom,on autots,on nropt,full,,on cnvtol,f,,0.005 cnvtol,u,1000,0.005 ALLSEL,ALL !删除温度场计算过程可能遗留的边界条件 SFDELE,ALL,ALL !删除面载荷 SFaDELE,ALL,ALL,ALL !删除作用在面载荷 ddele,all lsel,s,loc,z,4 dl,all,,all asel,s,loc,y,0 asel,r,loc,z,2,3 da,all,uy da,all,ux asel,s,loc,y,0 asel,r,loc,z,0,0.5 da,all,uy da,all,ux allsel,all asel,s,loc,x,0.5 asel,r,loc,z,1,1.01 esla,s ekill,all *do,t,0,l/v,4 asel,s,loc,x,0.5 asel,r,loc,z,1,1.01 esla,s nsle,s nsel,r,loc,y,v*t,v*(t+4) cm,weld,node cmsel,s,weld esln,s, ealive,all esel,s,live t=t+4 time,t autots,1 nsubst,4 ldread,temp,,,t,,'jhmx','rth' allsel,all solve *enddo |
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