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我在做直管的Two-way fsi。管材为聚乙烯,流体为常温下的水。我在管道入口加载一个高频正弦函数
if(t<1.5[s], 6.2e5[Pa]*cos(t*100*pi/1[s]), 0[Pa])
0-1.5s为初始化过程,1-1.5为Two-way FSI迭代过程
具体的设置在附件中
计算过程中出现好多
*** WARNING *** CP = 74.266 TIME= 08:39:40
There are 2 small equation solver pivot terms.
DISP CONVERGENCE VALUE = 0.2435E-01 CRITERION= 0.1188E-04
EQUIL ITER 1 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -0.3221E-03
FORCE CONVERGENCE VALUE = 1012. CRITERION= 4.170
DISP CONVERGENCE VALUE = 0.8861E-02 CRITERION= 0.1188E-04
EQUIL ITER 2 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= -0.1548E-03
FORCE CONVERGENCE VALUE = 880.8 CRITERION= 4.258
DISP CONVERGENCE VALUE = 0.2397E-02 CRITERION= 0.1188E-04
EQUIL ITER 3 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= 0.5073E-04
FORCE CONVERGENCE VALUE = 79.96 CRITERION= 4.345
DISP CONVERGENCE VALUE = 0.7659E-03 CRITERION= 0.1188E-04
EQUIL ITER 4 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= 0.1616E-04
FORCE CONVERGENCE VALUE = 8.204 CRITERION= 4.434
DISP CONVERGENCE VALUE = 0.3406E-04 CRITERION= 0.1188E-04
EQUIL ITER 5 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC= 0.7152E-06
FORCE CONVERGENCE VALUE = 0.1602E-01 CRITERION= 4.524 <<< CONVERGED
DISP CONVERGENCE VALUE = 0.1555E-06 CRITERION= 0.1188E-04 <<< CONVERGED
EQUIL ITER 6 COMPLETED. NEW TRIANG MATRIX. MAX DOF INC = 0.3248E-08
>>> SOLUTION CONVERGED AFTER EQUILIBRIUM ITERATION 6
*** LOAD STEP 3 SUBSTEP 1 COMPLETED. CUM ITER = 85
*** TIME = 1.02000 TIME INC = 0.100000E-01
然后
*** ERROR *** CP = 30.500 TIME= 08:34:05
One or more elements have become highly distorted. Excessive
distortion of elements is usually a symptom indicating the need for
corrective action elsewhere. Try ramping the load up instead of step
applying the load (KBC,1). You may need to improve your mesh to
obtain elements with better aspect ratios. Also consider the behavior
of materials, contact pairs, and/or constraint equations. If this
message appears in the first iteration of first substep, be sure to
run shape checking of elements |
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