THE CRITERION FOR ZERO MOMENT.
这个警告是告诉你模型中没有弯矩,没问题的,可以继续计算。
如果提示中出现特征值奇异的时候才是计算有可能出现不收敛的问题。
4 Degree of freedom 4 is not active in this model and can not be restrained 有限元软件计算对于实体步考虑转动自由度,所以你在边界条件中限制了456的自由度后,软件会忽略的啊.
5 The option *boundary,type=displacement has been used; check status file between steps for warnings on any jumps
prescribed across the steps in displacement values of translational dof. For rotational dof make sure that there are
no such jumps.All jumps in displacements across steps are ignored.
你采用了位移边界条件,但在平动自由度上,可能在不同的分析步骤里面有突变(你可以从sta文件里面查看),
并且应保证转动自由度无突变。 通知性质的warning,一般是因为你采用位移加载方式,都出这个。
6 The strain increment has exceeded fifty times the strain to cause first yield at 377 points
检查下约束够不够,约束够了就不用管了,这只是通知你,你的模型塑性应变很大,一般没多大问题。
7 123 nodes are used more than once as a slave node in *TIE keyword.One of the *TIE constraints at each of these
nodes have been identified in node set WarNodeOverconTieSlave
定义接触的时候,公共节点重复定义了好几次,这样可能会出现过约束问题(只是可能影响)..
8 There are 2 unconnected regions in the model.
可能是接触面由空隙,最好在接触属性中定义一个容差范围。
一般各个parts之间定义接触,aba都会这样通知用户的,只要接触设置对了,
一般没事。
9 Boundary conditions are specified on inactive dof of 124 nodes. The nodes have been identified in node set WarnNodeBCIactiveDof 边界条件定义的有问题:在124个节点的非自由度上有边界加载
10 The plasticity/creep/connector friction algorithm did not converg
一般是塑性应变太大,单元扭曲导致的。可以先改为弹性模型看看是否收敛;
学习下aba_aba大侠的指导吧
http://forum.simwe.com/viewthread.php?tid=684042
11 The ratio of the maximum incremental adjustment to the average characteristic
length is 1.82846e-02 at node 10868 instance jiti1 on the surface pair (assembly_jq22,assembly_q22).
可以通过调大预设值消除该提示and检查网格质量。
12 ELEMENT 42 INSTANCE SOIL3-1 IS DISTORTING SO MUCH THAT IT TURNS 应改进单元质量
13 650 nodes are either missing intersection with their respective master surface or outside the adjust zone.
改改tie里的tolarance试试
14 Dependent part instances cannot be edited or assigned mesh attributes
模型树--assembly-打击part 右键--make independent。也可以到模型树part步展开点mesh。
15 The aspet ratio for nnn elements exceeds 100 to 1. 单元划分网格长宽比不合适。如果这些单元在不重要的区域(对结果肯定有些影响, 影响大小取决于这三个单元的位置,在模型中的作用等),而且能计算,那就没问题了
16 123 elements are distorted
存在单元扭曲,如果这些单元在不重要的区域(对结果肯定有些影响, 影响大小取决于这三个单元的位置,在模型中的作用等),而且能计算,那就没问题了(同15)
17 ***WARNING: DEGREE OF FREEDOM 1 IS NOT ACTIVE ON NODE 6 - THIS BOUNDARY
CONDITION IS IGNORED
约束了单元没有得自由度对求解没有影响,可以查看下
18 热分析时出现了这样的警告“THERE IS ZERO HEAT FLUX EVERYWHERE
There is zero HEAT FLUX everywhere in the model based on the default criterion. please check the value of the
average HEAT FLUX during the current iteration to verify that the HEAT FLUX is small enough to be treated as zero.
if not, please use the solution controls to reset the criterion for zero HEAT FLUX. 试试:
(1)是不是热源定义的问题,错误信息是说热源量几乎为零。
(2)定义热源的子程序调用命令流应该为*HEAT GENERATION,在材料模块中定义,子程序为HETVAL。
19 The elements in the element set WarnElemSurfaceIntersect-Step1 are involved
surface intersections. Refer to the status and message file for further details 检查一下你单元集合的定义以及面的定义,看是否出现了相交或重复定义的情况
20 Boundary conditions are specified on inactive dof of 36 nodes. The nodes have been identified in node set WarnNodeBCInactiveDof.
http://forum.simwe.com/viewthread.php?tid=857956&extra=page=12&filter=type&typeid=68
21 Integration and section point output variables will not be output for deformable elements that are declared as rigid using the *rigid body option
这个仅是通知性质的(在interaction步设置为rigid body,不输出应力应变),你在interaction步定义了刚体约束的话,都会出这个警告。
22 For a self contact surface, the facets of the elements in element set WarnElemFacetThickPt63d-Step1 are thicker than 0.6 times an edge or diagonal length of the facets. Use the MAXRATIO parameter on *SURFACE DEFINITION to allow automatic rescaling of the contact thicknesses where necessary for this surface. Refer to the status file for further details.
http://forum.simwe.com/thread-867940-1-1.html
23 NO VALID RADIATION OUTPUT REQUESTS HAVE BEEN GENERATED. THIS MAY BE DUE TO EARLIER INPUT ERRORS OR SPECIFICATION OF A NONEXISTANT CAVITY OR SURFACE NAME
检查一下你的output設定裡是不是有些set或surface沒有設定到
24 123 nodes may have incorrect normal definitions. The nodes have been identified in node set WarnNodeIncorrectNormal。
先用1楼末尾的方法看看WarnNodeIncorrectNormal在哪儿。这个不一定是致命的警告,有时候可以忽略。如果模型不收敛,可以检查下是否有过约束, 在接触上存在边界条件or加载。
25 This option is not supported for element loop parallelization. If you have specified element loop parallelization, it will be turned off for this analysis http://forum.simwe.com/viewthread.php?tid=871350&extra=page=1&filter=type&typeid=68
27 msg出現COMPATIBILITY ERRORS
http://forum.simwe.com/thread-872274-1-1.html
-------------注意:各自模型千差万别,信息中的数字(如123个节点,200个单元等等)都是概数。
D系列
Compaq Visual
见3楼,是cdstudio版主发布关于fortran二次开发的错误表: Fortran -Complier Errors Manual.pdf (71 KB)
E系列
1 上文已经说过,类似于
---------------------------------------------------------------------------------------------------------- ERROR:Too many attamps have been made Too many attamps have been made....
THE SOLUTION APPEARS TO BE DIVERGING. CONVERGENCE ISJUDGED UNLIKELY.
TIME INCREMENT REQUIRED IS LESS THAN THE MINIMUM SPECIFIED Analysis Input File Processor exited with an error.
-----------------------------------------------------------------------------------------------------------
这样的信息几乎是无用信息(除了告诉你的模型分析失败以外,没有告诉你任何有用的东西)。宜再查找别的信息来考察。比如:
1 ) Numerical sigularity solver problem. numerical sigularity
when processing node105 instance 表示:数值奇异:刚体位移(欠约束) 2) Zero pivot 表示:过约束 这样的信息(当然不仅仅是这些),才是比较有价值的。
2 对于TIME INCREMENT REQUIRED IS LESS THAN THE MINIMUM SPECIFIED
Too many attamps have been made 不明白increcement的同学请看zyxie大侠的大作:《time increment的根本理解》(精华贴)http://forum.simwe.com/viewthread.php?tid=747885&extra=page=1&filter=digest
3 对于“网格扭曲”的警告: excessively distorted elements 前面有提到。
第一步:采用二楼底下的方法用display查看“ ErrElemExcessDistortion-Step1 ”在模型的哪些部位,做到心中有数。
第二步:检查模型的网格质量: mesh步---verify----Analysis Check选取模型。这种情况,一开始计算即出现“distorted element”的信息。Besides:很多其他问题也会网格扭曲警告。比如,几何模型导入有误需要修补、单元类型选取错误、边界条件有误、材料属性错误、接触设置不合理、子程序错误等。
第三步:即使你的网格划分很好,如果变形过大,也会导致网格扭曲。然后修改网格划分,怒要出现红色,关键区域不要出现黄色。(当然最好是所有的网格都用structure划分,且都没有红色、黄色出现。网格质量就比较好。这种情况,警告信息往往是在计算到一定步骤之后才出现“distorted element”。 这种情况建议采用ALE等方式,此不详述,搜索论坛“网格重划”“ALE”等技术。
ALE可参考:
htscut2010大侠的《[原创]ALE方法详解与各选项卡参数意义与设置》 http://forum.simwe.com/thread-873999-1-4.html
htscut2010大侠的《 [基础理论] (原创)ALE网格自适应方法浅见》 http://forum.simwe.com/viewthread.php?tid=873659&page=1#pid1609203
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