Learning Forum

[HZ776]

Hello,

I was doing a eigenvalue buckling analysis to find the first buckling mode. The static structural part works well, but it fails to solve the eigenvalue buckling part.

The solver output demonstrates following warning messages:

  SUBSPACE CALCULATION OF UP TO    1 EIGENVECTORS.
  NUMBER OF EQUATIONS               =        76830
  MAXIMUM WAVEFRONT                  =           54
  MAXIMUM MODES STORED           =            1
  MINIMUM EIGENVALUE                   = -0.10000E+31
  MAXIMUM EIGENVALUE                 =  0.10000E+31
  CENTER EIGENVALUE                    =  0.00000E+00


  Local memory allocated for solver                     =     61.549 MB
  Local memory required for in-core solution       =     58.710 MB
  Local memory required for out-of-core solution =     24.705 MB

  Total memory allocated for solver                     =    238.981 MB
  Total memory required for in-core solution       =    227.885 MB
  Total memory required for out-of-core solution =     96.285 MB

 *** NOTE ***                            CP =       7.109   TIME= 13:23:45
 The Distributed Sparse Matrix Solver is currently running in the       
 in-core memory mode.  This memory mode uses the most amount of memory  
 in order to avoid using the hard drive as much as possible, which most 
 often results in the fastest solution time.  This mode is recommended  
 if enough physical memory is present to accommodate all of the solver  
 data.                                                                  

 *** WARNING ***                         CP =      11.016   TIME= 13:23:49
 There are no solutions in the selected range.                          

 *** NOTE ***                            CP =      11.016   TIME= 13:23:49
 There are no modes in the specified range.                             

 *** NOTE ***                            CP =      11.016   TIME= 13:23:49
 There are no modes in the specified range.                              

How could this problem be solved?

Thanks.

[florence125]

Hello HZ776

I have the same problem with you. Have you solved the problem?

[KnHw]

Hello HZ776

 

same here for me. Sometimes it is working but sometimes not. Especially when I run models with a Load multiplier less then 50. Tried different solver, like in the manual Direct and Subspace.

[Jiewei Chen]

Hello HZ776

 

I have the same problem . Have you solved the problem?