beam單元和shell單元node to node 的tie接，計算總不收斂too many attempts.......，問題出在哪里？ 50
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***WARNING: THE SYSTEM MATRIX HAS 1 NEGATIVE EIGENVALUES. NEGATIVE EIGENVALUES MEAN THAT THE SYSTEM MATRIX IS NOT POSITIVE DEFINITE: FOR EXAMPLE, A BIFURCATION (BUCKLING) LOAD MAY HAVE BEEN EXCEEDED. ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE SLAB-1-LIN-3-1.8 D.O.F. 1 RATIO = 10.4341E+12 . ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE SLAB-1-LIN-3-1.8 D.O.F. 2 RATIO = 4.08250E+12. ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE SLAB-1-LIN-3-1.8 D.O.F. 3 RATIO = 9.68587E+12. ***WARNING: SOLVER PROBLEM. NUMERICAL SINGULARITY WHEN PROCESSING NODE SLAB-1-LIN-3-1.8 D.O.F. 4 RATIO = 451.986E+09 . ***WARNING: THE STRAIN INCREMENT IS SO LARGE THAT THE PROGRAM WILL NOT ATTEMPT THE PLASTICITY CALCULATION AT 136080 POINTS ***NOTE: MATERIAL CALCULATIONS FAILED TO CONVERGE OR WERE NOT ATTEMPTED AT ONE OR MORE POINTS. CONVERGENCE IS JUDGED UNLIKELY.
張曉丹 
