Moment Loads

Altair Forum User

How to assign moment loads in a load step in hypermesh?

Please state on how to give the direction also.

Thanks.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi @Sam George

 

It is similar to how you do with FORCE loads. 

 

Create Moment and refer the same as LOAD in loadstep.

Altair Forum User

 

Is there a way to solve this error? I have connected all dependent nodes on a single node( to apply force).

Thanks.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Hi @Sam George

 

Please check if all the DOFs of an RBE2 element ( ID =2) is switched ON

 

Please use  PARAM, RBE2FREE,YES will change ERROR 725 into WARNING 825,

 

Please share the .out file if you still face the problem 

Altair Forum User

I couldnt find 'rbe2free>yes' in control cards - param.

Altair Forum User

Hi, 

 

Please let me know what is the version of HyperWorks you are using.

 

 

Altair Forum User

I have attached the 'out' file. I couldnt find the rbe2free option in param card.

Also please tell a way to add two loads in a single loadstep, i have been trying, didn't work well.

Thanks.

Unable to find an attachment - read this blog

Altair Forum User

Hyperworks 14.0

 

Altair Forum User

Hi @Sam George

 

The way RBE2s are modeled is wrong. Select multiple nodes as dependent nodes and center node as independent node. Apply loads on Independent node. 

 

Apart from that there are issues with element quality. I corrected some and bypassed rest using PARAM>>CHECKEL>>NO.

 

Please run the attached file (Check the loads before you run)

 

Unable to find an attachment - read this blog

Altair Forum User

Sir, I have given changes as told. can u please mention how to include force and moment in a single loadstep?

 

 

Altair Forum User

Hi,

 

You can use LOADADD to combine two loads.

 

Create a load collector with loadadd as card image

Altair Forum User

is the card image as LOAD , cause there's no LOADADD card image.

Altair Forum User

Hi,

Please make sure you are in OptiStruct user profile

Altair Forum User

Yes its Optistruct and I'm using HW14.0

 

Altair Forum User

I think its Load as card image, it asks for load num set , Data. Can i add it here?

Altair Forum User

Yes it is LOAD if you dont have any updates for 14.0

Altair Forum User

 *** ERROR # 1996 *** in the input data:
 All entries have zero scale.

 

new error

Altair Forum User

Edit loaf card and provide scsle factor (S) as 1 

Altair Forum User

The scale factor is 1 by default. Still the same error comes up.

Altair Forum User

Can you post an image of Load card?

Altair Forum User

I think i have added moment in the 'force' load collector. Don't know if i did it right..

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

I changed the S1 value to '1'.

 

Altair Forum User

Load should take moment as well.

 

Please post a picture of load card from your model

Altair Forum User

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

Make load set number to two instwad of 1 as you have force and moment and refer the moment here with scale factor for moment as 1

 

Altair Forum User

I have edited as told ,please check for any correction.

The card image for 'moment' is none. Only with 'forces' i have added 'moment' using LOAD card image.

<?xml version="1.0" encoding="UTF-8"?>

Altair Forum User

I did the analysis, but the result doesn't reflect with the forces applied. Only moment deformation was shown.

The applied forces was high enough to show deformation, but nothing showed up. 

Altair Forum User

Sam,

 

You got it wrong.

 

I said create another load collector not to edit the existing force

Force and moment without card image. Create another load collector with load as card image and refer both moment and force here. Use the same in loadstep

Altair Forum User

Thanks a lot. Sorry for taking too long to understand. Thanks again for your time.

 

Sam