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我在进行热应力耦合计算的时候,算到中途的时候
弹出了许多警告信息,越来越多:
/COM,ANSYS RELEASE 9.0 UP20041104 17:27:10 07/18/2006
*** WARNING *** CP = 4.391 TIME= 17:27:21
The ETCHG command has changed some element types. Please examine not
only the KEYOPTs, but also the real constants, material properties,
boundary conditions, and loadings, and then modify as needed.
/COM,ANSYS RELEASE 9.0 UP20041104 22:03:37 07/19/2006
*** WARNING *** CP = 2582.359 TIME= 22:50:26
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 8778.984 TIME= 00:37:13
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 8819.703 TIME= 00:37:54
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 9532.203 TIME= 00:50:10
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 9579.875 TIME= 00:50:59
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 13850.125 TIME= 02:04:34
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 16687.906 TIME= 02:53:24
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 19428.266 TIME= 03:40:31
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 19470.312 TIME= 03:41:13
There are 2 small equation solver pivot terms.
*** WARNING *** CP = 31940.234 TIME= 07:15:51
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 39735.094 TIME= 09:30:26
There are 1 small equation solver pivot terms.
*** WARNING *** CP = 39789.297 TIME= 09:31:22
There are 4 small equation solver pivot terms.
*** WARNING *** CP = 39836.734 TIME= 09:32:10
There are 7 small equation solver pivot terms.
*** WARNING *** CP = 39884.047 TIME= 09:32:59
There are 5 small equation solver pivot terms.
*** WARNING *** CP = 39932.578 TIME= 09:33:48
There are 9 small equation solver pivot terms.
*** ERROR *** CP = 39932.828 TIME= 09:33:48
One or more elements have become highly distorted. Excessive
distortion of elements is usually a symptom indicating the need for
corrective action elsewhere. Try ramping the load up instead of step
applying the load (KBC,1). You may need to improve your mesh to
obtain elements with better aspect ratios. Also consider the behavior
of materials, contact pairs, and/or constraint equations. If this
message appears in the first iteration of first substep, be sure to
run shape checking of elements.
继而就不收敛了
我的非线形选项的设置如下:
ANTYPE,,REST
TRNOPT,FULL
NLGEOM,ON !包含预应力效应
NSUBST,3,0,0
KBC,1
CUTCONTROL,PLSLIMIT,10
CUTCONTROL,CRPLIMITexp,0.2,0
CUTCONTROL,CRPLIMITimp,0.25,1
CUTCONTROL,NPOINT,15
LNSRCH,ON
TIME,81*0.25
NLGEOM,ON
SSTIF,1
!NROPT,AUTO,,OFF
NROPT,FULL,,ON
EQSLV,,,0,
PRECISION,0
TOFFST,Wtoffst
OUTRES,ALL,LAST
SOLVE
请各位高手能否指点一下
我都做了好多遍了总是这个结果,郁闷的很,等着大家救火呢,哪位好心人能否给予无私的帮助啊
谢谢拉 |
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