最近在建立一个ANSYS热力耦合模型，是先算温度场，然后建立变形场之后用ldread,temp,last,,,,TEMP_1,rth命令导入温度结果，但是在计算变形场出现下面问题：

The LS-DYNA time step size should not exceed     0.190E-06

 to avoid contact instabilities.  If the step size is

 bigger then scale the penalty of the offending surface.

请问这个该怎么处理呢？

还有我温度场用的solid45,变形场用的SOLID164单元可以吗？

ET,1,SOLID164 

mp,dens,1,4560

MPTEMP,1,0,100,200,300,400,1000

MPDATA,NUXY,1,,0.3,0.295,0.293,0.292,0.291,0.290

MPDATA,EX,1,,60.698e9,55e9,50e9,50e9,50e9,50e9

MPDATA,ALPX,1,,9.01E-006,9.01E-006,9.01E-006,9.01E-006,9.01E-006,9.01E-006

TB,BKIN,1,5,2,1

TBTEMp,0

TBDATA,,1.398E+009,2.27E+009,

TBTEMP,200

TBDATA,,6.29E+008,1.1E+009,

TBTEMP,500

TBDATA,,4.4E+007,0.187E+009,

TBTEMP,700

TBDATA,,0.3E+007,0.5E+007,

TBTEMP,1000

TBDATA,,0.5E+006,0.1E+007,

ET,2,SOLID164,0,,,,0                   !砧板单元

edmp,rigid,2,6,7

MP,EX,2,2e10

MP,DENS,2,4560 

MP,NUXY, 2,0.3

ET,3,SOLID164,0,,,,0                   !砧板单元

edmp,rigid,3,7,7

MP,EX,3,2e10

MP,DENS,3,4560                             !定义密度

MP,NUXY, 3,0.3

变形场中材料模型这么定义可以吗？