The SUBCASE ID in ATT1 field of DRESP1 does not refer to a modal FRF subcase.
Altair EmployeeHey guys,
I am conducting a topology optimization with an eigen mode subcase. The analysis works fine. However, when setting a topology optimization the following error is given:
The SUBCASE ID in ATT1 field of DRESP1 1 does not refer to a modal FRF subcase.
The model setup is pretty much exatly the same to the tutorial: OS-2020: Increasing Natural Frequencies of an Automotive Splash Shield with Ribs.
Can you give me a hint why this error occurs?
Cheers,
Mike
... I am working with HyperWorks 2017
Answers
-
Hi Mike,
I am facing the same problem. I wanted to ask if you were you able to overcome this problem and if yes,can you please explain how?
Cheers,
Nipun
0 -
Hi @nipundahra
Which version of Hyperworks are you using?
This is a bug in 2017 and is fixed in 2017.2 which will be released soon. You can run the same in older versions instead.
0 -
0
-
Hi @rahul rao
Make sure you are selecting loadstep for frequency response when creating objective/Dconstraint function and not when creating the frequency response itself.
0 -
<?xml version="1.0" encoding="UTF-8"?>
0 -
i am selecting load in loadstep
0 -
Rahul
Dont select when creating response. instead select when you create objective or constraint.
0 -
when i do not select load step in response option then it is not creating a response
0 -
Hi Rahul,
Can you share the model file?
0 -
Sorry, i cannot share the file.
0 -
I am able to create frequency response without selecting any load step
Delete the existing and recreate another one.
0 -
HOW R U CREATING THAT? CAN U TELL THE STEP BY STEP PROCESS...
0 -
Responses>> FREQ>> Provide a name>> enter the mode number>> do not select loadstep>> click create
0 -
ok i can send u this file with same inputs for topography optimmiization
0 -
Rahul,
try this file
P,S: let me know once you are done with downloading. I will delete the file.
0 -
what happened ?
/
0 -
done downloaded
0 -
how you unselected the load in response of frequency?
0 -
yes, you can check in the entity editor.
<?xml version="1.0" encoding="UTF-8"?>
0 -
this is error i got when i ran the file which u gave me
0 -
Rahul,
You are trying a topography optimization. I would suggest to use frequency as either objective or constraint and use volume or mass as other response.
Though mass and volume will not reduce drastically, but it will support.
0 -
ok i try this
0
