| Author | Message | ||||
     lee (leemu215) Member Username: leemu215 Post Number: 22 Registered: 06-2008 |
I try to use this file ,but each this error message popup.Can u help me to solve this problem,besides there seems to be some convergens problem in this file also,I tried all day,but no success. Thanks very much!!!!!!
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| lee (leemu215) Member Username: leemu215 Post Number: 23 Registered: 06-2008 |
sorry , i know ,this error message is because of the student version,and I replace one of the variables with a constant value,then it seems that it can not converge. Thx in advance.
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| lee (leemu215) Member Username: leemu215 Post Number: 24 Registered: 06-2008 |
Is there anyone who can help me with this problem?Any comment will be appreciated. Thanks. | ||||
| Robert G. Nelson (rgnelson) Moderator Username: rgnelson Post Number: 1193 Registered: 06-2003 |
I don't understand what you are doing here. Your U and V equations do not balance stresses, they balance time derivatives of stresses. So if one node goes up, the neighbor has to go down. I think you should re-analyze what your equations mean. | ||||
| lee (leemu215) Member Username: leemu215 Post Number: 25 Registered: 06-2008 |
but in the example folder I find some equation which is exactly the same with this one. In order to quantify the load boundary condition mechanism, "consider the stress equations in their original form: dx(Sx) + dy(Txy) = 0 dx(Txy) + dy(Sy) = 0" | ||||
| Marek Nelson (mgnelson) Moderator Username: mgnelson Post Number: 100 Registered: 07-2007 |
These are not the same if you expand them. In your script Sx, Sy and Txy are defined in terms of time derivatives. In the examples "elasticity.pde" and "tension.pde" in the "Samples|Steady-state|Stress" folder, Sx, Sy and Txy are not defined this way. They are defined only in terms of spatial derivatives. |
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