蠕变分析求教convergence value=NaN错误

zongdao

我最近做材料的高温蠕变分析模拟热处理消除残余应力，材料既有塑变又有蠕变。但在第一个蠕变载荷步出现错误F convergence value=NaN。请问如何解决呢？谢谢。

部分命令流如下：
ET,1,PLANE77
ET,2,SOLID186
TOFFST,273  
MPTEMP,,,,,,,,  
MPTEMP,1,0   
MPDATA,PRXY,1,,0.3  
MPTEMP,,,,,,,,  
MPTEMP,1,0
MPTEMP,2,200
MPTEMP,3,400
MPTEMP,4,600
MPTEMP,5,800
MPTEMP,6,1400
MPTEMP,7,2000
MPDATA,EX,1,,2.1e11
MPDATA,EX,1,,1.96e11  
MPDATA,EX,1,,1.75e11
MPDATA,EX,1,,1.35e11
MPDATA,EX,1,,0.5e11
MPDATA,EX,1,,0.1e10
MPDATA,EX,1,,0.1e10            
MPTEMP,,,,,,,,  
MPTEMP,1,20
MPTEMP,2,100
MPTEMP,3,200
MPTEMP,4,300
MPTEMP,5,400
MPTEMP,6,500
MPTEMP,7,1300
MPTEMP,8,1400
MPTEMP,9,1500
UIMP,1,REFT,,,20
MPDATA,ALPX,1,,12.7e-6
MPDATA,ALPX,1,,12.7e-6
MPDATA,ALPX,1,,13.1e-6
MPDATA,ALPX,1,,13.7e-6
MPDATA,ALPX,1,,14.1e-6
MPDATA,ALPX,1,,14.4e-6
MPDATA,ALPX,1,,14.4e-6
MPDATA,ALPX,1,,0
MPDATA,ALPX,1,,0
TB,BISO,1,5,2,  
TBTEMP,0  
TBDATA,,4.60E8,21,,,,
TBTEMP,400
TBDATA,,3.95E8,17.5,,,,
TBTEMP,700
TBDATA,,6E7,5,,,,   
TBTEMP,1400
TBDATA,,1.2e6,0.1,,,,
TBTEMP,2000
TBDATA,,1.2e6,0.1,,,,

TB,CREE,1,1,4,8
TBTEMP,0
TBDATA,,1.7e18,0.0125,6.5,66185,,   


求解设置：
/SOL

ANTYPE,0
LUMPM,0
NLGEOM,1
SSTIF,0
NROPT,FULL, ,ON
EQSLV,PCG,1.0e-5,0,
PRECISION,0
MSAVE,0
CNVTOL,,-1,5
CNVTOL,F, ,0.005,2,0.01,   
CUTCONTROL,CRPLIMIT,0.1,1
OUTRES,ALL,NONE
OUTRES,ESOL,LAST
SOLCONTROL,ON
ISFILE,READ,instress,txt, ,0
DA,11,ALL,0
DA,10,ALL,0
DA,20,ALL,0
DA,21,ALL,0


RATE,OFF
TIME,1.0E-8
SOLVE
SAVE

RATE,ON
*DO,I,1,100
LDREAD,TEMP,,,108*I, ,'dibanleibanhuihuo','rth',' '
TIME,0.03*I
AUTOTS,1
DELTIM, , , ,1  
KBC,0  
TSRES,ERASE
NSUBST,10,20,5,1   
LNSRCH,1
PRED,ON
SOLVE
SAVE
*ENDDO

schuhi

我要咨询ansys计算蠕变的方法，求指教啊！！！谢谢啊