ABAQUS不收斂原因求助?
***WARNING: THE SYSTEM MATRIX HAS 1 NEGATIVE EIGENVALUES.
EXPLANATIONS ARE SUGGESTED AFTER THE FIRST OCCURRENCE OF THIS MESSAGE.
ASYNCHRONOUS TRACKING ELEMENT LOOP STARTED
CONVERGENCE CHECKS FOR EQUILIBRIUM ITERATION 1
AVERAGE FORCE 1.410E+06 TIME AVG. FORCE 1.410E+06
LARGEST RESIDUAL FORCE 5.795E+08 AT NODE 51 DOF 2
INSTANCE: GUANDAO1
LARGEST INCREMENT OF DISP. 2.439E+04 AT NODE 46 DOF 3
INSTANCE: GUANDAO1
LARGEST CORRECTION TO DISP. 2.433E+04 AT NODE 46 DOF 3
INSTANCE: GUANDAO1
FORCE EQUILIBRIUM NOT ACHIEVED WITHIN TOLERANCE.
AVERAGE MOMENT 9.768E+04 TIME AVG. MOMENT 9.768E+04
LARGEST RESIDUAL MOMENT 1.994E+07 AT NODE 2 DOF 4
INSTANCE:
LARGEST INCREMENT OF ROTATION -23.8 AT NODE 46 DOF 4
INSTANCE: GUANDAO1
LARGEST CORRECTION TO ROTATION -23.8 AT NODE 46 DOF 4
INSTANCE: GUANDAO1
MOMENT EQUILIBRIUM NOT ACHIEVED WITHIN TOLERANCE.
NUMBER OF EQUATIONS = 27762 NUMBER OF FLOATING PT. OPERATIONS = 1.74E+09
USING THE DIRECT SOLVER WITH 4 PROCESSORS
CHECK POINT START OF SOLVER
CHECK POINT END OF SOLVER
ELAPSED USER TIME (SEC) = 0.50000
ELAPSED SYSTEM TIME (SEC) = 0.10000
ELAPSED TOTAL CPU TIME (SEC) = 0.60000
ELAPSED WALLCLOCK TIME (SEC) = 1
***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
GUANDAO1.148 D.O.F. 2 RATIO = 167.536E+12 .
***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
GUANDAO1.148 D.O.F. 3 RATIO = 242.816E+12 .
ASYNCHRONOUS TRACKING ELEMENT LOOP STARTED
CONVERGENCE CHECKS FOR EQUILIBRIUM ITERATION 2
AVERAGE FORCE 16.9 TIME AVG. FORCE 16.9
LARGEST RESIDUAL FORCE 4.99 AT NODE 1485 DOF 2
INSTANCE: GUANDAO1
LARGEST INCREMENT OF DISP. -2.561E+05 AT NODE 605 DOF 2
INSTANCE: GUANDAO1
LARGEST CORRECTION TO DISP. -2.569E+05 AT NODE 605 DOF 2
INSTANCE: GUANDAO1
FORCE EQUILIBRIUM NOT ACHIEVED WITHIN TOLERANCE.
AVERAGE MOMENT 1.17 TIME AVG. MOMENT 1.17
LARGEST RESIDUAL MOMENT -0.345 AT NODE 3 DOF 5
INSTANCE:
LARGEST INCREMENT OF ROTATION 407. AT NODE 292 DOF 4
INSTANCE: GUANDAO1
LARGEST CORRECTION TO ROTATION 430. AT NODE 46 DOF 4
INSTANCE: GUANDAO1
MOMENT EQUILIBRIUM NOT ACHIEVED WITHIN TOLERANCE.
NUMBER OF EQUATIONS = 27762 NUMBER OF FLOATING PT. OPERATIONS = 1.74E+09
USING THE DIRECT SOLVER WITH 4 PROCESSORS
CHECK POINT START OF SOLVER
CHECK POINT END OF SOLVER
ELAPSED USER TIME (SEC) = 0.60000
ELAPSED SYSTEM TIME (SEC) = 0.10000
ELAPSED TOTAL CPU TIME (SEC) = 0.70000
ELAPSED WALLCLOCK TIME (SEC) = 0
***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
GUANDAO1.148 D.O.F. 2 RATIO = 178.205E+12 .
***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE
GUANDAO1.148 D.O.F. 3 RATIO = 95.3996E+12 .
ASYNCHRONOUS TRACKING ELEMENT LOOP STARTED
問一下，這些警告是不是因為計算不收斂的原因呢？怎么解除這些警告呢？因為一個模型計算了很久都不收斂，找不到原因，最近一直在查找問題。還望知道的人解答一下，謝謝了
易煒 
