beam单元和shell单元node to node 的tie接,计算总不收敛too many attempts.......,问题出在哪里? 50

***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.
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  • Mr李
    2017年12月19日
    看提示 是存在缸体位移
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  • 星辰_北极星
    2017年12月19日
    选择的模拟方法的问题,壳体和杆,可以采用stringer,也就是壳体上面抽筋,共节点建模。看这个会有帮助的:http://mp.weixin.qq.com/s/IKRB6Q9JW5zoILPVm_kN9A
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  • beam单元和shell单元node to node 的tie接,计算总不收敛too many attempts.......,问题出在哪里?的相关案例教程

    Too many attempts made for this increment The analysis has been terminated due to previous errors. All output requests have been written for the last converged increment. Abaqus/Standard Analysis exit
    1、塑性材料和接触面上都不能用C3D20R和C3D20单元,这可能是你收敛问题的主要原因。如果需要得到应力,可以使用C3D8I (在所关心的部位要让单元角度尽量接近90度),如果只关心应变和位移,可以使用C3D8R, 几何形状复杂时,可以使用C3D10M。 2、接触对中的slave surface应该是材料较软,网格较细的面。 3、接触面之间有微小的距离,定义接触时要设定“Adjust=位置误差限
    最近看到有许多用abaqus软件做有限元的朋友碰到这样一个问题: Too many attempts made for this increments。 这个错误产生的深层次原因在于,abaqus系统在求解非线性微分方程时采用的是迭代求解,当迭代求解次数大于5次(可以设置)或者增量步小于用户设定的最小增量步(可以设置)时,就意味着迭代求解的失败,也就是所谓的求解不收敛。这样一个问题是一个看似青铜,
    在用abaqus仿真壳体非线性静力学分析问题时,报错 Too many attempts made for this increment The analysis has been terminated due to previous errors. All output requests have been written for the last converged increment. Ab
    Beginning of keyword reader 05/10/22 12:18:29 Memory required to process keyword : 19091970 *** Warning 20282 (STR+282) warpage angle of element ID= 2366 is computed as 1.6715E+02 degrees. *** Warning