** ERROR # 312 ***
Altair EmployeeHello
I am making a topology optimization for a rotational disk that rotates under 4500 RPM. It should be just free in radial direction. I always see the same error shown below. How can I solve it. I read all previous comments about the same error. Most it said that it can be because of my constraints. Although I change my constraints it gives the same error. Can anyone help me for that.
Thank you in advance
In static load case 1
the compliance is negative or large 1.77994e+020.
Optimization/buckling analysis cannot be performed.
due to possible rigid body mode.
Answers
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Looks like the model is not stable for the load applied.
Can you reduce the load and check if this gives any good results (say 5 units)
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It works now. Thanks
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I have one more question. In my project I have to give RPM and also external pressure to my disk. But I cannot specify two different loads in one topology optimization. I looked for this to some tutorials but noone solved any parts with more than one load collector. Is there any way to do that?
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Hi,
You can add two loads using LOADADD and use the same in load step details.
<?xml version="1.0" encoding="UTF-8"?>
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I couldn't find any information about LOADADD. I am using hyperworks student edition. How can I open LOADADD command?
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When creating a load collector, select LOADADD as card image.
<?xml version="1.0" encoding="UTF-8"?>
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Thank you very much for your answer. It could do it. By the way the card lmage is changed to 'LOAD' in the last version of hyperworks.
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OK, I am using 2017 and it is LOADADD
sorry about the confusion .
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i have this problem now and i look at all topics about that on forum , i couldn't fix it ,can you help me ?
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someone can help me please ?
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It works but i dont understand that how did you do connectivity ?
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Use Equivalence panel (SHIFT+F3)
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Thank you so much
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