OVERCLOSED ERROR怎么解决

20040456

msg 文件出现这个错误***ERROR: TOO MANY ATTEMPTS MADE FOR THIS INCREMENT
什么问题呢
下面是MSG中的警告信息，请问如何解决
***WARNING: THE SYSTEM MATRIX HAS 21 NEGATIVE EIGENVALUES.
     IN AN EIGENVALUE EXTRACTION STEP THE NUMBER OF NEGATIVE EIGENVALUES IS
     EQUAL TO THE NUMBER OF EIGENVALUES BELOW THE CURRENT SHIFT POINT.
     THIS MAY BE USED TO CHECK THAT EIGENVALUES HAVE NOT BEEN MISSED.
     NOTE: THE LANCZOS EIGENSOLVER APPLIES AN INTERNAL SHIFT WHICH WILL
     RESULT IN NEGATIVE EIGENVALUES.
     IN A DIRECT-SOLUTION STEADY-STATE DYNAMIC ANALYSIS, NEGATIVE
     EIGENVALUES ARE EXPECTED. A STATIC ANALYSIS CAN BE USED TO VERIFY THAT THE SYSTEM IS STABLE.
     IN OTHER CASES, NEGATIVE EIGENVALUES MEAN THAT THE SYSTEM MATRIX IS NOT
     POSITIVE DEFINITE:
     FOR EXAMPLE, A BIFURCATION (BUCKLING) LOAD MAY HAVE BEEN EXCEEDED.
     NEGATIVE EIGENVALUES MAY ALSO OCCUR IF QUADRATIC ELEMENTS ARE
     USED TO DEFINE CONTACT SURFACES.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74600 IS OVERCLOSED BY 3.93186
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74614 IS OVERCLOSED BY 3.07369
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74963 IS OVERCLOSED BY 3.748
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 76600 IS OVERCLOSED BY 3.07018
   WHICH IS TOO SEVERE.

***NOTE: SEVERE CONTACT OVERCLOSURES EXIST. CONVERGENCE IS JUDGED UNLIKELY.

  INCREMENT     1 STARTS. ATTEMPT NUMBER  2, TIME INCREMENT  2.500E-02

***WARNING: THE SYSTEM MATRIX HAS 24 NEGATIVE EIGENVALUES.
             EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74600 IS OVERCLOSED BY 3.79578
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74963 IS OVERCLOSED BY 3.61586
   WHICH IS TOO SEVERE.

***NOTE: SEVERE CONTACT OVERCLOSURES EXIST. CONVERGENCE IS JUDGED UNLIKELY.

  INCREMENT     1 STARTS. ATTEMPT NUMBER  3, TIME INCREMENT  6.250E-03

***WARNING: THE SYSTEM MATRIX HAS 22 NEGATIVE EIGENVALUES.
             EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74600 IS OVERCLOSED BY 3.75872
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74963 IS OVERCLOSED BY 3.58018
   WHICH IS TOO SEVERE.

***NOTE: SEVERE CONTACT OVERCLOSURES EXIST. CONVERGENCE IS JUDGED UNLIKELY.

  INCREMENT     1 STARTS. ATTEMPT NUMBER  4, TIME INCREMENT  1.563E-03

***WARNING: THE SYSTEM MATRIX HAS 22 NEGATIVE EIGENVALUES.
             EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74600 IS OVERCLOSED BY 3.72376
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74963 IS OVERCLOSED BY 3.54738
   WHICH IS TOO SEVERE.

***NOTE: SEVERE CONTACT OVERCLOSURES EXIST. CONVERGENCE IS JUDGED UNLIKELY.

  INCREMENT     1 STARTS. ATTEMPT NUMBER  5, TIME INCREMENT  3.906E-04

***WARNING: THE SYSTEM MATRIX HAS 21 NEGATIVE EIGENVALUES.
             EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74600 IS OVERCLOSED BY 3.64151
   WHICH IS TOO SEVERE.
   CONTACT PAIR (SURF-CONTACT-TRD,SDRUM) NODE 74963 IS OVERCLOSED BY 3.46982
   WHICH IS TOO SEVERE.

***NOTE: SEVERE CONTACT OVERCLOSURES EXIST. CONVERGENCE IS JUDGED UNLIKELY.

***ERROR: TOO MANY ATTEMPTS MADE FOR THIS INCREMENT

danieldon

LZ问的这些问题都是最基本的WARNING警告信息，参考书里面都有提到，不过建议你看版主aba_aba总结的帖子【ABAQUS常见问题汇总】，直接在论坛里面搜索就可以了。

20040456

好的，谢谢

萨利斯特

最后都是怎么解决的啊

xiaolingzi07

大佬怎么解决的？