框架+砌体填充墙 接触 不收敛（悬赏30仿真币）

luckyajiao

砌块之间以及砌块和框架之间设置为接触，自重分析就进行不下去，出现TOO MANY ATTEMPTS MADE FOR THIS INCREMENT。
哪位帮忙看下模型，是哪里有问题呢？

luckyajiao

怎么无法上传了？

***WARNING: THE SYSTEM MATRIX HAS 2 NEGATIVE EIGENVALUES.
             EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.

***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
             WALL-1-LIN-2-18.34 D.O.F. 2 RATIO = 372.828E+12  .
***WARNING: DISPLACEMENT INCREMENT FOR CONTACT IS TOO BIG.
***WARNING: DISPLACEMENT INCREMENT FOR CONTACT IS TOO BIG.
***WARNING: DISPLACEMENT INCREMENT FOR CONTACT IS TOO BIG.
***WARNING: DISPLACEMENT INCREMENT FOR CONTACT IS TOO BIG.

luckyajiao

帮帮忙吧，各位。

luckyajiao

还是没解决啊。。。。

luckyajiao

再等等

luckyajiao

谢谢bananaliuchao的帮助

luckyajiao

2方向的数值奇异，也就是说2方向欠约束，可不知道是哪的问题？

luckyajiao

2方向考虑了摩擦后，解决了数值奇异问题。网格划分也会有数值奇异问题。
现在是无数值奇异，计算也无法进行，网格粗细都试过，还是不行，还可能是哪方面的问题呢？请大家帮忙啊。

luckyajiao

     ANALYSIS SUMMARY:
     TOTAL OF          1  INCREMENTS
                       5  CUTBACKS IN AUTOMATIC INCREMENTATION
                      81  ITERATIONS INCLUDING CONTACT ITERATIONS IF PRESENT
                      81  PASSES THROUGH THE EQUATION SOLVER OF WHICH
                      81  INVOLVE MATRIX DECOMPOSITION, INCLUDING
                       0  DECOMPOSITION(S) OF THE MASS MATRIX
                       1  REORDERING OF EQUATIONS TO MINIMIZE WAVEFRONT
                       0  ADDITIONAL RESIDUAL EVALUATIONS FOR LINE SEARCHES
                       0  ADDITIONAL OPERATOR EVALUATIONS FOR LINE SEARCHES
                     289  WARNING MESSAGES DURING USER INPUT PROCESSING
                       5  WARNING MESSAGES DURING ANALYSIS
                       0  ANALYSIS WARNINGS ARE NUMERICAL PROBLEM MESSAGES
                       5  ANALYSIS WARNINGS ARE NEGATIVE EIGENVALUE MESSAGES
                       1  ERROR MESSAGES

luckyajiao

Whenever a translation (rotation) dof at a node is constrained by a kinematic coupling definition the translation (rotation) dofs for that node cannot be included in any other constraint including mpcs, rigid bodies, etc.

THE SLAVE SURFACES ASSEMBLY__PICKEDSURF1154 AND ASSEMBLY__PICKEDSURF1100 INTERSECT EACH OTHER. THEY ARE PAIRED WITH MASTER SURFACES ASSEMBLY__PICKEDSURF1153 AND ASSEMBLY__PICKEDSURF967 THAT ALSO INTERSECT EACH OTHER. IF BOTH PAIRS ARE *CONTACT PAIRs, THESE TWO PAIRS SHOULD NOT BE SIMULTANEOUSLY PRESENT IN A STEP BECAUSE OF POSSIBLE CONVERGENCE PROBLEMS; USE *MODEL CHANGE,TYPE=CONTACT PAIR TO REMOVE ONE OF THEM. IF BOTH ARE *TIE PAIRS, THE REDUNDANT TIES WILL BE REMOVED AUTOMATICALLY. IF ONE PAIR IS *TIE AND ANOTHER IS *CONTACT PAIR, REMOVE ONE OF THEM.

For *tie pair (assembly__pickedsurf1583-assembly__pickedsurf955), adjusted nodes with very small adjustments were not printed. Specify *preprint,model=yes for complete printout.

上述警告信息在不开洞填充墙框架模型也出现过，不影响计算。现在只是开门洞就一直无法计算了。

luckyajiao

终于找到了不收敛的原因，一个接触对的从面选择错了。
这种错误不能再犯了，认真检查模型很重要。