Error during analysis - Optistruct
Altair EmployeeHallo ,
I planned to implement the BC, Load cases what is exactly in ( Link Provided) in to my model which is already topologically optimized . I applied all the details that are provided and I am getting the following error , Could anyone please provide or check how to rectify the error. I would like to do linear static analysis with my approach in this already topologically optimized model. Thanks in advance . Here with I showed what the error is and also my hm file for your reference .
*** WARNING 1931: SPC SID= 4 is not referenced by Case Control.
*** WARNING # 1848
Topology optimization without minimum member size control activated.
Using DTPL card or DOPTPRM,MINDIM is recommended.
NOTE # 1852
AUTOMATIC SCREENING is activated.
Use DSCREEN,AUTO,OFF to disable automatic screening.
*** ERROR # 339 ***
The dependent d.o.f. is constrained by grid or spc data.
RBE3 element id = 34776.
grid id = 6689.
component = 2.
*** ERROR # 339 ***
The dependent d.o.f. is constrained by grid or spc data.
RBE3 element id = 34777.
grid id = 6690.
component = 1.
*** ERROR # 329 ***
RBE3 element 34779 cannot support a x-moment - check element data.
*** ERROR # 330 ***
RBE3 element 34779 cannot support a y-moment - check element data.
*** ERROR # 331 ***
RBE3 element 34779 cannot support a z-moment - check element data.
Number of bad RBE3 elements = 3
Answers
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@Prakash Pagadala Thanks for your info and as you said I used RB2 for all three non-design component. But now i am getting element quality error. I checked in element quality tab ( warpage , jacobian is 0 error only with skew angle and tet collapse I am getting some error ) I am getting error because of this problem or something else . would be much appreicated if you say . Thanks in advance and for your reference i attached out file and also the updated hm file .
Kind Regards,
Muthu.
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Hi Muthu,
You can by pass element quality check by setting PARAM>>CHECKEL>>NO
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Hallo Mr.Prakash ,
Thanks for your valuable info and it worked , I could run my model and with no ERROR. I would like to run only linear - Static Analysis not OPTIMIZATION so when I tried to run my model in hyperview for frame 0 it shows and for the subsequent frames its not showing properly . Could you take a look for a minute and check wat might be the problem . I think if i make it then i can finish up this work and thanks for your previous assist
/emoticons/default_smile.png' srcset='/emoticons/smile@2x.png 2x' title=':)' width='20' /> . For your reference attached the fem file so you can directly look in Hyperview . Anticipating your positive response .
Kind Regards,
Muthu.
<?xml version="1.0" encoding="UTF-8"?>
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Hi Muthu,
Can you check the dimensions?
Looks like there is some problem with model dimensions.
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Hallo Mr.Prakash,
The Dimension of the model is defined already , because it is already topologically optimized model I cant refine or redo any changes in to that . I want to do Linear -Static analysis in this model by different mesh refining methods. Will it be any other problem like the way I approached ? or if this is only because of the given model . By the way thanks alot for your valuable info .
Kind Regards,
Muthu.0 -
Muthu,
If you look at the length of the component it is around 0.2mm and mass is 1.3e-11 tonnes which looks impractical for such a component.
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